Input amplifier board for

THRESHOLD SA/3     Verkaufe meinen THRESHOLD SA/3 LIMITED EDITION PURE A KLASSE Verstärker in perfektem Zustand. 53W per chanel Seltene Verstärker, beste serie von Threshold nach vielen Kritiks mit einem voragendem Klang in alle Musik style. Immer in einem non smoking Zimmer. Nur Abhohlung oder Sendung unter Vollverantwortung und kosten kann der Amplifier geschickt sein.       THRESHOLD SA3 LIMITED EDITION PURE CLASS A AMP WORKING PERFECT VERY GOOD CONDITION,   Threshold SA/3 Stasis Power amplifier Optical Bias Power Amp. 50 watts per channel -- Pure Class A. These amps do not come up for sale very often -- for good reason. Designed by Nelson Pass during Threshold's heyday and considered to have very smooth sound, good thermal stability and more detail than Threshold's earlier amps. Threshold referred to the sound of this SA series as "extraordinary musical accuracy". The SA/3 is a favorite of Threshold lovers for its warm sound, and this amp is built like a tank. Machined-aluminum faceplate and metal chassis. Gold-plated machined Teflon insulated input connectors, five-way binding posts with gold-plated contact surfaces, military grade glass epoxy circuit boards are all hand soldered, and assembly and final adjustment was completed under the supervision of Nelson Pass. It delivers 16 continuous amps and 80 peak amps per channel and will effortlessly drive most speakers. Threshold SA/3 50watt/channel Stasis Pure Class A Power Amplifier. This amplifier, designed by Nelson Pass and Built in the USA by Threshold employs pure Class A circuitry at every stage - there is no corrective feedback loop, and the resulting sound is absolutely unmatched. There is nothing on the market today that comes close. This amplifier will drive even the most difficult speakers (think Quads or other electrostatics), as well the simplest bookshelf system, to the very limits of their sonic capability. Circuit boards are military grade, glass epoxy, with gold over nickel over copper plated traces. All connections are hand soldered. This is a limited edition. Input connections are gold plated. This amp is absolutely Gem Mint inside and out and sounds magnificent. It weighs 56 pounds Um ohne Gefährt vorwärts zu fahren ist Mir lieber eine Abholung. Der Kunde eine Sendung möchte geht auf eigene Kosten und Risiko.   Preis:  2200€   Mein Handy: (33) 608980215 Ich kann wegen Corona bis Kehl fahren

EN BON ETAT IL FONCTIONNE BIEN A 40 watt output with mains and 12 volt operation makes this amplifier suitable for use in a wide variety of medium-sized public address systems. There are two balanced microphone inputs, a jack socket is provided on the front panel for microphone one, while microphone two has a voice activated priority circuit to automatically mute all other inputs. There are two auxiliary inputs for background music. Bass, treble and a dual auxiliary control are located on the front panel. Colour: Black Dimensions (mm): 88x272x240 Weight (kg): 5.2 DC Input (V): 12 Power Input: 230 VAC @ 50 Hz Power RMS (W): 40 Frequency Response (Hz): 60-15000 Outputs: 8 Ohm or 70 V/100 V Booster Output: 775 mV 600 Ohm Auxillary Input: 100 mV/50 k Ohm Priority Microphone: Yes (1.5 mV/600 Ohm) Vox Sensitivity: Off - 0.7 mV Vox Reduction (dB): 40 THD: Less than 3% Condition In a great condition, shows a only light signs of use.

1 Original Stanton Magnetics Input/Output Board Set Original Part# RM100 20018 for the RM-100 mixer In Very Good condition

For sale Oppo HA-1 DAC & headphone amplifier. The amplifier has been very well taken care of (still has the original screen protection film) and is in very good condition (minor imperfection in the upper right corner next to potentiometer - hardly visible, check pics). Exquisite build and fantastic quality. Included:  - Oppo HA-1 DAC & headphone amplifier  - Remote control  - Power cord (EU)  - USB cable  - SPDIF coaxial cable The item will be carefully packed and sent via tracked and insured shipping. HIGH PERFORMANCE AUDIO - Discrete Class A Amplifier A Class A amplifier conducts signal over the entire range of the input signal cycle. The output transistors are biased to operate in their most linear range, and there is no crossover distortion caused by switching the signal between two push-pull devices. The HA-1's power amplification circuit for the headphones is Class A built with discrete transistors. The discrete design allows us to hand-pick and match the best parts to build the HA-1. - Toroidal Power Supply A toroidal power transformer offers superior power efficiency and much lower exterior magnetic fields over traditional laminated steel core transformers. The HA-1's toroidal linear power supply provides a very clean and robust power source to the audio components. - Fully Balanced Design The internal analog audio signal path of the HA-1 is fully balanced. For digital audio, the signal runs in balanced mode all the way from the DAC to the output jacks. Balanced analog input is kept intact, and single-ended input is converted to balanced at the input buffer. All single-ended outputs are derived from the balanced signal as well. The balanced design provides better common-mode noise rejection and improves signal quality. The balanced headphone output provides twice the voltage and four times the power of the single-ended output, enabling the HA-1 to drive the most power hungry headphones. It also provides better channel seperation by eliminating the common ground return path. - ESS Sabre32 Reference DAC The DAC is one of the most important components for digital audio playback. The SABRE32 Reference ES9018 from ESS Technology is the world’s best performing 32-bit audio DAC solution targeted for high-end consumer applications and professional studio equipment. With the ESS patented 32-bit Hyperstream™ DAC architecture and Time Domain Jitter Eliminator, the SABRE32 Reference DAC delivers an unprecedented DNR (Dynamic Range) of up to 135dB and THD+N (Total Harmonic Distortion plus Noise) of -120dB, the industry’s highest performance level that will satisfy even the most demanding audio enthusiast. To learn more about the technologies behind the exceptional performance of the SABRE DAC, please read the SABRE Technical White Paper. OPPO HA-1 4.3" information display - Clean Signal Path The HA-1 uses an analog potentiometer (the familar volume knob) to control the volume. By avoiding re-digitizing the audio signal for volume adjustment, the HA-1 provides a clean signal path for the audio. At the same time, the convenience of modern digital volume control is not lost - a remote-controlled motor turns the volume knob and a 10-bit analog-to-digital converter samples the signal to display a numeric dB level. - Made for iPod®, iPhone® and iPad® The HA-1 passes Apple's "MFi" certification and is compatibile with the latest iPod, iPhone and iPad to be used as the digital audio output accessory of these devices. By tapping directly into the digital audio signal of these devices and converting the audio to analog using the high performance SABRE32 Reference DAC, music from your favorite portable device will sound its best. - Wireless Audio via Bluetooth The HA-1 supports Bluetooth Advanced Audio Distribution Profile (A2DP) with both the standard and aptX® high quality codec. Simply pair your phone with the HA-1 and set music free

For sale Sony TA-88 amplifier + ST-88 receiver 1972 vintage. Condition: Both tems are in original used but fully functional condition (tested on Audio Precision analyser) Receiver has one very small dent in faceplate else fine. Spécifications: Power output: 13 watts per channel into 8Ω (stereo) Frequency response: 15Hz to 50kHz Input sensitivity: 3mV (MM), 250mV (line) Signal to noise ratio: 60dB (MM), 80dB (line) Output: 250mV (line), 30mV (DIN) Dimensions: 130 x 230 x 165mm Weight: 3.2kg Year: (1972 - 1976). ST-88 receiver Classic vintage Sony ST-88 FM / AM round dial tuner with wooden case (1973 - 1976). Electric power requirements: Input voltage: 110 - 127 / 220 - 240 V Input frequency: 50 / 60 Hz Collection and demo welcomed in Ardeche France Worldwide shipping in very secure package. Shipping France by registered insured Colissimo R2 with tracking number 17 euros Europe including Switzerland 22 euros World 43 euros

For sale an original JRDG dac board kit based on AD1853 chip for Capri / Continuum. It features two boards labelled "Install on Left Input" and "Install on Right Input", a wire link and two copper mounting pillars. Item is as new with very little use. Worldwide shipping accepted

Welcome! For sale is Electro-Voice CPS4.10 apmlifier with 4 channels of each nominal output is 1000W. MSRP: 3200 US$ Amplifier was never used (just tested before i made this listing) and it is 100% operational. See more technical details below. Shipping We will ship to any location worldwide. Please send us message for shipping cost to your location. All customs fees are not included in the international shipping costs. Buyer is responsible for all customs fees.  Please contact us if you have any question regarding this item.  CPS4.10 This four-channel CPS amplifier from Electro-Voice features groundbreaking Class-D technology for maximum amp efficiency and minimized heat dissipation in 19-inch racks. Each channel individually provides transformerless, switchable output characteristics, which enable specific channels to achieve maximum drive. Power into 2 Ohms, 4 Ohms, 70V, or 100V line – no transformers are required. In Hi-Z operation (70V or 100V), a 50 Hz high-pass filter (HPF) provides protection against loudspeaker transformer saturation. Additionally, amplifier channels can be bridged in pairs for double output power. Each contractor-friendly, multi-channel CPS amplifier also features Phoenix-type connectors for inputs and outputs, pre-programmable power-on delay, easy power-on remote via contact closure, and rear level controls. A module slot for the RCM-810 remote control module provides control network functionality, allowing for remote system diagnostics and control via IRIS-Net software. In addition, using the RCM-810’s Variable Load Drive feature can tailor the amplifier’s output power to match every load from 2 Ohms up to 10 Ohms in steps of 0.1 Ohms. Features: - Class-D design for high-efficiency and low heat dissipation - Flexible matching for Low-Z and High-Z applications - Optional remote control via IRS-Net - Four-channel design in 2RU chassis Specifications: - Maximum Midband Output Power (THD=1%, 1kHZ): 4 x 1000W @ 2 ohms 4 x 1000W @ 4 ohms 4 x 1000W @ 70V 4 x 1000W @ 100V - Rated Output Power (THD 4 x 900W @ 2 ohms 4 x 900W @ 4 ohms 4 x 900W @ 70V 4 x 900W @ 100V  - Maximum Bridged Output Power (THD=1%, 1kHz) 2 x 2000W @ 4 ohms 2 x 2000W @ 8 ohms 2 x 2000W @ 140V 2 x 2000W @ 200V - Maximum RMS Voltage Swing (THD=1%, 1kHz, per channel): 100V - Power Bandwidth (THD=1% ref.1kHz, half power @ 4 ohms load): 10Hz-25kHz, 50Hz-25kHz  - Voltage Gain, ref. 1kHz: 32 dB (2ohm/4ohm mode), 33dB (70V mode), 36dB (100V mode)  - THD at rated output power (MBW=80kHz, 1kHz): - IMD-SMPTE, 60Hz, 7kHz: - DIM30, 3.15kHz, 15kHz: - Maximum Input Level: +21dBu - Crosstalk, ref. 1kHz at rated output power: - Frequency Response, ref. 1kHz: 10Hz-30kHz (+/-1dB) - Input Impedance, active balanced: 20k ohms - Damping Factor, 1khz, 8 ohms: >240 - Slew Rate: 28V/us - Output Noise, A-weighted: - Output Stage Topology: Class D - Power Consumption, 1/8 max. output power @ 4 ohms: 840W - Power Requirements: 220-240V, 50-60Hz or 120V, 50-60Hz or 100V, 50-60Hz - Protections: Audio Limiters, Temperature, DC, HF Short Circuit, Peak Current Limiters, Inrush Current Limiters, Turn-on Delay - Cooling: Front-to-rear, continuously variable fans - Ambient Temperature Limits: 40 to 105 deg. F - Safety Class: I - Dimensions (W x H x D): 19" x 34.7" x 16.6" - Weight: 24.6 lbs - Optional Accessories:  2-way internal X-Over cards, 24dB, LR, XHP-5 for 500Hz/XHP-8 for 800Hz RCM-810 IRIS-Net Control & Supervision Module Rear-Rackmount Kit RMK-15

Tube Amplifier Bias Board. Input 230v ac, output up to -160 vdc. Controls 4 tubes bias voltage and  current independantly. Set it once for all and bias will never move. Ideal when using a toroidal power transformer as an output one, to cancel DC current in primary. Will be shipped from France. Please ask for shipping cost depending on your location. Best regards

Great integrated amplifier, comes with the optional wireless card (worth of 300 euros!) and the optional remote, sold separately for 45 euros. It was a secondary system that was not been used much, in perfect working condition and looks. Great DAC on the wireless side of CD quality without compression (16 bits / 44 kHz) and also an excellent headphone output. I'm also throwing in the CD50 player that it worked absolutely perfectly until recently, when it no longer turns on. I took a look inside, but everything seems in order, no burnt parts, I don't know what could be the cause and I don't have time, someone else could fix it and use it, it sounds great and it cost about 650 euros! So consider it as a bonus to the associated amplifier! Made in France. No original box but will be extremely well packaged. Would consider posting it internationally but please, ask for a quote as the postage differs from country to country and the amount in the description is for European Union only, thanks. A pure sound reproduction that does not lack warmth. When listening, the device immediately stands out for the subtlety and delicacy of its sound reproduction. It is a follower of purity and its midrange register is particularly elegant. It manages to be very rich in colors and timbres, while demonstrating a very high transparency with an excellent presence effect. The Atoll IN50 is unpretentious, does not seek to impress, neither by its appearance nor by its performances, but delivers a restitution that is both very delicate and full of energy. Stereo integrated amplifier Symmetrical structure 1.5 mm steel chassis Mos-Fet transistors 160 VA toroidal transformer Electronic protection Measurements Power: 2x50 W under 8 ohms and 2x70 W under 4 ohms Pulse power: 90 W Input sensitivity: 100 mV Power supply: 160 VA Current capacity: 15,000 µF Input impedance: 220 kohms Frequency response: 5 Hz to 100 kHz Connections 6x RCA stereo analog inputs and 1x monitoring output 1x 3.5 mm mini-jack headphone output (front) 2x RCA stereo pre-out outputs Gold-plated screw terminals General Minimum consumption: 11 W Maximum consumption: 200 W Dimensions (lxhxp): 440 x 90 x 270 mm Weight: 7 kg DAC Burr Brown PCM1754 Lossless CD quality transmission (16 bits / 44 kHz) Arcam / teac / marantz / denon / yamaha / onkyo / atoll / nad / fidélité musicale / gustard / ifi / moniteur audio / klipsch / ifi / AudioQuest / Astell b'&' Kern / iBasso / Hidizs / Fiio / Shanling / beyerdynamic / meze / hifiman / audio technica / akg / bel canto / violectric / lehmann / parasound / benchmark / auralic / burson / aune / Arcam, Benchmark, Einstein, Pass, Mark Levinson, ifi, Eversolo, Fidelice, Mytek, Hegel, Nuprime, Auralic, Rupert Neve, Chord, Naim, PS Audio, Parasound, Sparkos, Atoll, Nad, Sugden, Exposure, Krell, Leak, Advance, Cayin, Luxman, Yamaha, Cambridge, Quad, Cyrus, quad / cambridge audio / Cayin / beyerdynamic / meze / hifiman / audio technica / akg / bel canto / violectric / lehmann / parasound / benchmark / auralic / burson / aune / feliks / vincent / little dot / prima luna / pathos / willsenton / reisong / woo / fezz / pier audio / jadis / sennheiser / schiit / topping / luxman / ZMF, sparkos, geshelli, paradis musical, fosi, KEF, Linn, gato, m2tech, Arcam / quad / cambridge audio / teac / marantz / denon / yamaha / onkyo / atoll / nad / musical fidelity / gustard / ifi / monitor audio / klipsch / ifi / AudioQuest / Astell b'&' Kern / iBasso / Hidizs / Fiio / Shanling / Cayin / beyerdynamic / meze / hifiman / audio technica / akg / bel canto / violectric / lehmann / parasound / benchmark / auralic / burson / aune / feliks / vincent / little dot / prima luna / pathos / willsenton / reisong / woo / fezz / pier audio / jadis / sennheiser / schiit / topping / ZMF, sparkos, geshelli / emotiva / krell / leak / sugden / hegel / exposure wiim, eversolo, sony, aune, gustard, smsl, volumio, matrix, KEF, Linn, gato, m2tech, sony, edifier, jbl, wharfedale, jamo, kanto, ruark, tria En savoir plus Collaboration commerciale.

MARANTZ 1060 Stereo Integrated Amplifier Amplificateur Stéréo Intégré The Marantz 1060 is a stereo console amplifier featuring three line inputs, one phono input and a tape loop. The amplifier section is split into pre and power sections which can split for use with an external processor. The unit has two sets of switchable sockets for main/remote speakers. Specifications Power output: 30 watts per channel into 8Ω (stereo) Frequency response: 20Hz to 20kHz Total harmonic distortion: 0.5% Damping factor: 45 Input sensitivity: 1.8mV (MM) Dimensions: 14-11/64 x 4-23/32 x 11-1/32 inches Weight: 18lbs Year: 1971 Le Marantz 1060 est un amplificateur de console stéréo doté de trois entrées ligne, une entrée phono et une boucle de bande. La section amplificateur est divisée en sections pré et puissance qui peuvent être divisées pour une utilisation avec un processeur externe. L'unité dispose de deux jeux de prises commutables pour les haut-parleurs principaux/à distance. Caractéristiques Puissance de sortie: 30 watts par canal en 8Ω (stéréo) Réponse en fréquence: 20 Hz à 20 kHz Distorsion harmonique totale: 0,5% Facteur d'amortissement: 45 Sensibilité d'entrée: 1,8 mV (MM) Dimensions: 14-11/64 x 4-23/32 x 11-1/32 pouces Poids: 18 livres Année: 1971 BON ETAT!!! TRÈS PROPRE! Les photos sont la partie de la description. Vous achetez ce que vous voyez. Pour toutes questions ou photos supplémentaires, n'hésitez pas à me contacter. Attention! Le prix de la livraison varie en fonction du pays.  Demandez-moi le prix de la livraison, s'il vous plaît. Ask for shipping costs. Shipping to the islands is more expensive.

CELLO DUET 350 Stereo Power Amplifier by Mark Levinson Serial number 00006 This amplifier comes from the auction of the equipment of a French audiophile. It is in working condition and appears to be in its original condition. It was used with a YBA preamp and Martin Logan CLS II speakers. I did not have the amplifier serviced. Of course for optimal use, it will probably be necessary to plan to change the capacitors and do a general overhaul. It is sold as is. The amplifier is in good cosmetic condition. There are slight marks on the handles (see photos) It is sold without cables Comes with a copy of the owner's manual Shipping is given as an indication, please ask for a shipping quote Product Specifications: Class of operation: Class AB2 Power Output (single amp): @8 Ohms Rated: 350 Watts @4 Ohms Rated: 600 Watts Power Output (bridged amps): @8 Ohms Rated: 1,200 Watts IMD (SMPTE): 0.3% (60 Hz / 8 Ohms / 52.92 V Output) IMD (CCIF): THD (20 - 20000Hz): Frequency Response: +0/-0.8 dB @ 10 - 20000 Hz Dynamic Headroom: 1.8 dB Channel Separation: 90 dB Signal to Noise: Input Sensitivity: 1.491 V (8 Ohms / 350 Watts / 52.92 Volt Output) Input Impedance: 1 mOhm (Non-Inverting) 5000 Ohm (Inverting) 1 mOhm (Unbalanced) Gain: 31 dB (Unbalanced) 37 dB (Balanced) Dimensions: 19"w / 12.62"h / 23.25"d Shipping Weight: 100 lbs. N'hésitez pas à me contacter si vous souhaitez des photos ou informations supplémentaires Arrivages réguliers, visitez notre boutique et ajoutez nous a vos vendeurs favoris

iFi Audio Pro iESL Headphone Amp for Electrostatic Headphones.  The Pro Series iESL electrostatic headphone amplifier from iFi AUDIO offers transparency and an ultra-wide frequency range. It works with all Stax, Sennheiser Orpheus, and electrostatic headphones. Drive Your Electrostatic Headphones to the Max and Use with a Headphone Amp: iFi Pro iESL Energizer Charges Your 'Phones, Supplies Needed Extra Voltage, Yields Incredible Transparency Drive your electrostatic headphones with the iFi Pro iESL Electrostatic Headphone Energizer and experience the phenomenal transparency, ultra-wide dynamics, and natural musicality for which the style is renowned. Offering perfect bias, impedance, and termination matching with every electrostatic ‘phone around, Pro iESL paired with a high-end headphone amplifier supplies the proper extra-high-tension voltage required by electrostatic headphones – something conventional amplifiers cannot offer. Pro iESL "energizes" the electrostatic plates in your ‘phones, giving them the power they need to operate at peak potential. A hand-wound permalloy core transformer, capacitive battery supply, and bias voltage generator do the work so all you have to do is listen to what you've been missing. iFi Pro iESL is the flagship your electrostatic need and deserve. 100% Music Direct Guaranteed. Please note: iFi Pro iESL is strictly for use with electrostatic headphones and needs to be paired with a headphone amplifier. Maximum Output voltage:   640V RMS (16Ω/20V in)  320V RMS (64Ω/20V in) Frequency Response: 5Hz-50kHz (-3dB) Input Voltage (Pro iESL): 5V-9V/1A max Input Voltage (iPower): AC 85-265V, 50/60Hz Power Consumption: < 1W Dimensions (DWH): 8.4" x 8.1" x 2.5" Weight: 5.5 lbs.  Bought in 09/2019 - Mint Condition -  Sold with full set of accessories and original box.  Still under Manufacturer Warranty (IFI Audio)

QSC CX168 8-channel Low-Z Professional Amplifier. Used, Tested. Features: 90 watts per channel at 8 ohms and 130 watts per channel at 4 ohms Compact size—only two rack spaces and 14" deep for reduced rack space Channel pairs bridgeable for maximum flexibility Exclusive PowerLight switch-mode power supply technology for high performance and compact size Active inrush limiting eliminates AC inrush current, removing the need for expensive power sequencers Four HD15 DataPorts (one per channel pair) for Q-SYS networked control and monitoring Custom integrated gain control security cover for tamper-proof installations 1-dB recessed detented gain controls for fast and accurate settings Detachable Euro-style input and output connectors DIP switch control for clip limiters, high-pass filters, bridge mono and parallel operation Selectable high-pass filters protect speakers and prevent speaker transformer saturation with minimal effect on program material (33 Hz or 70 Hz) Comprehensive front panel indicators including signal, clip, bridge mono and parallel input LEDs Fully protected—including DC, infrasonic and ultrasonic, thermal overload and short circuit protection High-performance Class AB+B complementary bipolar output circuitry Lightweight—only 21 pounds (9.5 kg) for easier racking and shipping All CX Series amplifiers meet the European Union's, 2006 RoHS directive to restrict the use of hazardous materials used in electronic devices.

Mc2 Mc750 Power Amplifier. In very good condition Fans have been upgraded with noctuas which are way more silent compared to the originals Description: MC750 digitally controlled power amplifier represents the latest technology in control circuitry coupled to a no compromise high quality class AB power amplifier. There is no dynamic switching of theaudio or power rails (a very common method of achieving extra power at the expense of audio quality) thus ensuring optimum sonic performance. The digital control monitors the operating parameters and adjusts the amplifier to suit the conditions. Fan speed and supply rails are varied as required to keep the amplifier within its temperature limits. The levels are adjusted by specially selected, high performance, digitally controlled attenuators. Signal limiters are included, the attack and release times of which can be adjusted internally by the bit switches on the control PCB (printed circuit board). The amplifiers include full DC and short circuit protection which automatically re-connects when the fault is cleared. Specifications: Power output: 625 watts per channel into 8Ω (stereo), 2150W into 8Ω (mono) Frequency response: 20Hz to 20kHz Total harmonic distortion: 0.03% Damping factor: 400 Gain: 31 dB Input sensitivity: 1.5V Signal to noise ratio: 106dB Speaker load impedance: 2Ω (minimum) Dimensions: 480 x 88 x 410mm Weight: 18.5kg

Truly exceptional equipment for its size, very powerful and impressive sound, perfect working condition. Could consider posting it internationally but please, ask for a quote as the postage differs from country to country and the amount in the description is for European Union only, thanks. This ad is for the amp only, no headphone is part of the sale! (if that is needed to be specified anymore) The CanAmp is a two-stage amplifier. While the first - voltage gain - stage is based on an integrated circuit of the highest audio pedigree, the second - power gain - stage is a single-ended, pure Class-A amplifier. It enables the CanAmp to drive virtually any headphones from 8 ohms up to 600 ohms. As its output power (at 8 ohm) is nearly 1W, the CanAmp could drive even a high-sensitivity loudspeaker! The unit has no internal wiring, and the signal path is kept to a minimum on its PCB. Its high-quality, 1 dB-tolerance Blue Alps volume pot goes through a further selection process during manufacturing to achieve an even tighter, 0.5 dB tolerance. The CanAmp not only has a line-level input but offers a line-level output to boot; it can therefore be connected to the TAPE MONITOR output of an amplifier, leaving the TAPE output free for additional components (MP3, MiniDisc, CDR, etc.). Gold-plated RCA terminals are used, and soldered directly onto the fibreglass PCB. Measured performance is excellent, the bandwidth going far beyond the audio range in both bass and treble, with low distortion into any normal headphone impedance and plentiful output. Output level isn’t everything and the Heed will in any case drive even harder, but this amp impressed not least on account of its large audio scale. Indeed, even with quite modest volume-control settings the soun just seemed big and generous, tonally, dynamically and even spatially. Once again, there’s a lot of detail, but the dominant impression is of size. Funnily enough, this was perhaps more pronounced with some unaccompanied solo vocals than with orchestra or mega-rock, but that just serves to remind one that the human voice can indeed be a very big instrument. Perhaps if you like your music a bit on the polite side this may seem a touch excessive, but we freely confess that we just loved it. Tonality is great too. Very wide soundstage. Open airy 3D sound. The soundtage seems to stretch way beyond the headphones with an airy feel each instrument separated in its own space. Imaging is well defined and the midrange and treble are at a level that makes listening for long periods very non-fatiguing. The Op-amp can be swapped for other types to give a different sound balance if preferred such as the AD823AN (more pronounced high end) or LM4562NA (more forward sound with better bass control). Having said that the supplied chip sounded the best overall to my ears. b'"'What blew me away is the depth of the music, it seems to have layer upon layer thus making the music three dimensional. This thickness is then presented with an almost reverb quality that makes you feel engulfed by the music. I am hearing stuff that I did not know was recorded in my Cd's because I could not hear it before.b'"' b'"'I don't care how big the amp or how big its price tag, the HEED is by far the best I have heard to date bar none. As you say the b'"'depthb'"' is palpable with every instrument in its own space in time.... once you get over the psychological fact that this amp only costs XYZ and the circuit is SO simple that it can't possibly sound good and you start listening (and enjoying) the music you start realising just how good an amp this is. don't care how big the amp or how big its price tag, the HEED is by far the best I have heard to date bar none. As you say the b'"'depthb'"' is palpable with every instrument in its own space in time.... once you get over the psychological fact that this amp only costs XYZ and the circuit is SO simple that i En savoir plus