Turntables    Amplifiers    Cassette Decks    CD Players    Guitar Amps    Tuners    Speakers    Communications    VCRs    In Progress    Tubes    Pro Audio    Cartridges and Needles    Speaker Stands   

Amplifiers
All amplifiers serviced and tested for perfect operation of all features.

Any general questions or to arrange viewing email me at fred@retrotronics.co.nz

Audiophile Power Amplifier (sold)

Nice implementation of the well proven Jaycar KC5201 Kit modules. Extremely solid power supply with a big toroid and overkill 6 x 6000mfd smoothing capacitors. I measured 186 watts into 8 ohms both channels driven. Massive headroom for the right source and speakers.

The gain of this one has been set to .7V rms for full power. Can be driven direct from a cd player or ipod/tablet etc. Has a stereo gain/volume control on the hardwood front panel. The rest of the chassis is aluminium. Premium gold parts have been used for the input RCA's and the output binding posts.

Can also be driven from a preamp, smart tv, computer, mixer, DAC, bluetooth box, chromecast etc. This kind of performance normally costs thousands of dollars, yours for pocket money.

125 watts continuous (very conservative) .03% distortion
3 Month warranty
Audiophile Power Amplifier
sold   

Kenwood KA-3004 Vintage Amplifier (sold)

Interesting Japanese amp from 1973. Nice aluminium faceplate and knobs.

Serviced and working well in good condition. Missing black tops off some of the switches, still work fine.

Power output: 14 watts per channel into 8Ω (very conservative)
Frequency response: 20Hz to 50kHz
Total harmonic distortion: 0.5%

3 Month Warranty
Kenwood KA-3004 Vintage Amplifier
sold   

Akai AM-2200 Vintage Amplifier (sold)

Made in Japan 1976 Good phono stage and Aux input for devices.
Serviced and working well in excellent condition.

Power output: 20 watts per channel into 8Ω (conservative)
Frequency response: 20Hz to 20kHz
Total harmonic distortion: 0.5%

3 Month Warranty
Akai AM-2200 Vintage Amplifier
sold   

Kenwood KA-3700 Vintage Amplifier (sold)

Late 70's silver face minimalist. Everything you need is here without gimmicks.

Serviced and working like new in near mint condition. Barely used, stored most of it's life.

20W conservative (measured 30)
.08% Distortion

3 Month Warranty
Kenwood KA-3700 Vintage Amplifier
sold   

Sony STR-DB930 Receiver (sold)

Full featured, powerful home theatre style receiver. Nice higher end model with radio text, gold rca's etc.
Phono input for turntable, works great as a regular stereo amp with bonus extra zones and power.
Near mint condition. Manual but no remote.
110WPC into 8 ohm. 4 ohm capable.
3 Month Warranty
Sony STR-DB930 Receiver
sold   

Denon PMA-717 Audiophile Amplifier (sold)

Good value medium power unit from 1985. Has excellent phono stage with moving coil capability.

Serviced and working well in near mint condition.

35WPCH .05%THD
Made in Japan
3 Month Warranty
Denon PMA-717 Audiophile Amplifier
sold   

Yamaha AX-500 Audiophile Amplifier (sold)

Powerful, respected Japanese component from 1989. Has tone defeat, moving coil capable phono preamp, separable pre and power amp stages, heavy binding posts and other pro/audiophile features.

Serviced and working well in excellent condition.

Power output: 85 watts per channel into 8Ω (stereo)
Frequency response: 20Hz to 20kHz
Total harmonic distortion: 0.01%

7.7kg Made in Japan

3 Month Warranty
Yamaha AX-500 Audiophile Amplifier
sold   

Kenwood KA-4000 Vintage Amplifier (sold)

Extremely well made Japanese component from the late 60's. Solid binding posts for two sets of speakers. Inputs for two turntables and multiple line level devices.

Solid aluminium front panel which is engraved and filled - a rare and high end feature. Knobs are solid aluminium and secured with two grub screws each. Tone controls are actual 11 position switches with hand wired components.

Serviced and working well. Lightly cleaned and refurbished. Presentable condition. Note wood chip off right cheek.

Power output: 32 watts per channel into 8Ω (stereo)
Frequency response: 20Hz to 50kHz
Total harmonic distortion: <0.5%

3 Month Warranty
Kenwood KA-4000 Vintage Amplifier
sold   

Akai AA-1050 Vintage Receiver (sold)

Hefty, well appointed Japanese showpiece from 1978. Has inputs for two tape machines, two turntables as well as Aux. No less than 3 sets of speaker terminals with the ability to run two sets simultaneously.

Serviced with new some new caps. Switches and controls cleaned and treated. Some worn lettering otherwise excellent condition including dark wood veneer cabinet.

50 WPC
480 x 155 x 390mm
13Kg
3 Month Warranty
Akai AA-1050 Vintage Receiver
sold   

Yamaha AX-590 Audiophile Amplifier (sold)

Powerful, full featured pure stereo integrated from the 90's. Tone/selector bypass for CD input and tone bypass for other inputs. Excellent phono stage with MC capability. Pre-outs, two sets of heavy binding posts. Full tape routing for two machines, variable loudness contour.

Serviced and working well in good condition.

100WPC .015%THD 10.4kg

3 Month Warranty
Yamaha AX-590 Audiophile Amplifier
sold   

Pioneer SX-424 Vintage Receiver (sold)

Sweet looking basic amp with built in AM/FM Tuner. Has phono and line level inputs as well as microphone and heaphone jacks.

Refurbished with new dial lamps, cleaned switches and pots and upgraded with modern speaker connectors for easy hookup.

Power output: 12 watts per channel into 8Ω (stereo)
Frequency response: 20Hz to 70kHz
Total harmonic distortion: <1%

3 Month Warranty
Pioneer SX-424 Vintage Receiver
sold   

Kenwood KA-4000 Vintage Amplifier (sold)

Extremely well made Japanese component from the late 60's. Solid binding posts for two sets of speakers. Inputs for two turntables and multiple line level devices.

Solid aluminium front panel which is engraved and filled - a rare and high end feature. Knobs are solid aluminium and secured with two grub screws each. Tone controls are actual 11 position switches with hand wired components.

Serviced and working well. Lightly cleaned and refurbished. Presentable condition.

Power output: 32 watts per channel into 8Ω (stereo)
Frequency response: 20Hz to 50kHz
Total harmonic distortion: <0.5%

3 Month Warranty
Kenwood KA-4000 Vintage Amplifier
$280   enquire

Hitachi SR-6010 Vintage Receiver (sold)

Capable transistor amplifier with built in tuner from 1980.
Good phono stage with subsonic filter. Tape input can be used for ipod etc. Two sets of good strong speaker binding posts

Serviced and working well in excellent condition.
45WPC

3 Month Warranty
Hitachi SR-6010 Vintage Receiver
sold   

Harman Kardon PM625 Stereo Amplifier (sold)

Simple very wideband amplifier for use with turntable, ipod/phone or standard stereo components. Serviced in good condition.

Power output: 20 watts per channel into 8Ω (stereo)
Frequency response: 0.3Hz to 120kHz
Total harmonic distortion: 0.09%
5.8kg

3 Month Warranty
Harman Kardon PM625 Stereo Amplifier
sold   

DSE A2760 Amplifier (sold)

Slim style component sold by Dick Smith when they actually sold something worth having. Toroidal transformer has separate windings per channel making for a near dual mono design. Tone defeat, huge speaker binding posts and two sets of 10,000 MFD capacitors complete the picture. No phono input, total of 4 line level inputs.

Serviced and working well in excellent condition.

60WPC
10kg
3 month warranty
DSE A2760 Amplifier
$250   enquire

Sansui QR-4500 Vintage 4 Channel Receiver (sold)

One of the original status symbol models from the early 70s. Solid machined aluminium knobs held on with grub screws. Use as a normal stereo amplifier or 2 zone multichannel or play 4 channel vinyl with the built in decoder.

Serviced and lightly refurbished. All lamps and functions working. Very nice original condition. Real wood finish.

27WPC
Dimensions: 538 x 197 x 362mm
Weight: 22kg
3 month warranty
Sansui QR-4500 Vintage 4 Channel Receiver
sold   

Sansui AU-222 Vintage Stereo Amplifier (sold)

Cute Japanese amp from the late 60's. The lowest of the famous "3 digit" series. Known for natural tube like sound.

Serviced in good clean condition. Working well.

18WPC
29 x 11 x 27cm
3 Month Warranty
Sansui AU-222 Vintage Stereo Amplifier
sold   

Onkyo Integra A-8170 Audiophile Amplifier (sold)

Powerful Japanese component from 1989. Has direct in, moving coil phono capability and a very smooth and large volume control.

Serviced, cleaned and ready to enjoy

Power output: 80 watts per channel into 8Ω (stereo)
Frequency response: 2Hz to 50kHz
Total harmonic distortion: 0.008%
11Kg

3 Month warranty
Onkyo Integra A-8170 Audiophile Amplifier
sold   

Sansui AU-6500 Vintage Audiophile Amplifier (sold)

Rare and beautiful piece from 1972, the start of the golden era of Sansui.
Serviced and lightly refurbished. Working well.

Power output: 30 watts per channel into 8Ω (stereo)
Frequency response: 10Hz to 30kHz
Total harmonic distortion: 0.1%
11.5Kg
3 Month Warranty
Sansui AU-6500 Vintage Audiophile Amplifier
sold   

Denon PMA-750 Audiophile Amplifier (sold)

Substantial Japanese silver component from 1984. Has big binding posts, tone bypass, moving coil capable phono stage and subsonic filter.

Bass control is a subtle low frequency lift useful to correct the bottom end on small speakers etc.

Serviced and working well in good condition.

Dimensions Width 434x height 132x depth of 407mm
80WPC .08%THD
12Kg
3 Month Warranty
Denon PMA-750 Audiophile Amplifier
sold   

Akai AM-U01 Stereo Amplifier (sold)

Compact Stereo amp with inputs for turntable and multiple line level devices including ipod etc.

Lighting upgraded to cool green look. Serviced in good condition.
Has two power outputs at the back to supply other equipment.

Free matching tuner if wanted.

20WPC .3% THC
3 Month Warranty
Akai AM-U01 Stereo Amplifier
sold   

NAD 7220PE Audiophile Receiver (sold)

Classic English amplifier with built in digital tuner from the 80s. Very good phono stage and headphone output.

Led display bright and clear. Excellent tuner with low noise and distortion.

Serviced with caps checked and boards cleaned. Working well in very good condition.

3 Month Warranty
NAD 7220PE Audiophile Receiver
sold   

NAD 3240PE Audiophile Amplifier (sold)

Nice example of this classic British piece from 1989. Runs cool and reliable like a 25 watt amp but has short term power reserves of over 150 watts for considerable headroom and musical impact.

Serviced and well preserved in near mint condition.

Power output: 40 watts per channel into 8Ω (stereo)
Frequency response: 20Hz to 20kHz
Total harmonic distortion: 0.03%

1 year warranty
NAD 3240PE Audiophile Amplifier
sold   

Akai AM-U55 Stereo Amplifier (sold)

Beefy and well above average component from the early 80s
NZ assembled so includes 3 pin plugs for switched and unswitched power supply to other components. This allows you to switch on the rest of your system with the power amp switch.

Led level meters and good strong connectors for two pairs of speakers. Sockets for two tape machines allowing dubbing between the two.

Serviced and working well in excellent condition.

55 WPC THC .05%
10.1kg
3 month warranty
Akai AM-U55 Stereo Amplifier
sold   

NAD 3120 Audiophile Amplifier (sold)

Stripped down and improved version of the hall of fame 3020 model. No tone controls, moving coil capable phono stage and separate pre and power stages. This model also came with better speaker binding posts to take good cable or banana plugs.

The 3020 series are respected because of the soft clipping function and very high short term current capability, performing like an amp many times the power and price.
The circuitry is elegant and simple. For example mechanical thermal cutouts are used for protection instead of relays, these also function as very low value emitter resistors enabling the famed high currents.

Serviced and working well in good clean condition.

25WPC conservative .02% distortion
3 month warranty
NAD 3120 Audiophile Amplifier
sold   

Yamaha AX-550 Audiophile Amplifier (sold)

Beefy well equipped component made in Japan in 1991. Has pre-out main-in, moving coil capable phono, direct input, nice big binding posts.

Serviced and working well in good clean condition.

This amp will bring out the best in any good pair of floorstanding speakers. Use with a turntable or lossless digital to exploit the ultra low distortion.

85WPC .007%THC
11Kg
3 Month Warranty
Yamaha AX-550 Audiophile Amplifier
sold   

Sony STR-230 Vintage Receiver (sold)

Cool looking amp from the 70s. Serviced and working well with new lighting and conditioned controls and switches.
Inputs for turntable and line level devices.

Near mint condition
Includes a pair of rca speaker cables.
3 month Warranty
Sony STR-230 Vintage Receiver
sold   

Akai AA-1175 Vintage Stereo Receiver (sold)

One of the best Akai monster style amps. Made in Japan in 1978.
Has separate power supplies for left and right, a design only used in the very best models.

Serviced and perfectly preserved in mint, almost unused condition.

75WPC
1 year warranty to Auckland customer
48 x 15 x 42cm
18Kg
Akai AA-1175 Vintage Stereo Receiver
sold   

Koncept KA-55 Audiophile Amplifier (sold)

This amp is heavy and powerful with some high end facilities.
Moving coil capable phono stage and preamp out links. Adjustable loudness, gold phono sockets.

Serviced and working well. Has some blemishes but good presentable condition.

55WPC (measured 65)
3 Month Warranty
8Kg
Koncept KA-55 Audiophile Amplifier
sold   

Pioneer A-400x Audiophile Amplifier (sold)

Well known and respected model worthy of the best speakers and source. There are no tone, balance or loudness controls to blur the sound. Phono preamp has moving coil option.

Serviced and working well in good condition. Very clean inside and out.

60WPC
.03% distortion
8kg
1 year warranty
Pioneer A-400x Audiophile Amplifier
sold