Counterpoint SA-5000A SA-5000 Hybrid Tube Preamplifier with Matching PSU in Silver
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Details:
This listing includes
one Scarce "A" Version of the famous Counterpoint SA-5000 Hybrid Tube Preamplifier as shown. This includes the factory matching power supply as well.
Cosmetically this is a very clean overall unit with a really nice face-plate with no scratches. There are light signs of wear overall; mostly on the black screen top cover as shown. Overall this is a very presentable piece that looks great when setup. (see photos)
The SA-5000A was considered one of the best sounding stereo preamplifiers at the time.
The last 5000A we sold was over 20 years ago; and this is the first one we have seen since.
Both the preamplifier and PSU were just returned from Elite Audio & Service in Altoona, WI. Elite Audio was a Certified Counterpoint Dealer for years; and their service department has quite a bit of knowledge and experience with the Counterpoint line.
Both units were professionally serviced: the PSU fuse was replaced, a 6V regulator & logic parts in the delay "turn on" circuit in the preamp were replaced; and both units were fully bench tested.
This particular SA-5000A should be considered as ready to plug, play, and enjoy!
Please review all attached photos and be sure to ask any questions.
Serial Number 165K51
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Brief Overview / Specs (on the 5000 - not the "A")
The preamp is equipped with various capacities and inductive characteristics, and with resistance loads such as volume and balance control, which can obscure the signal purity. The RIAA demodulation network circuit also requires severe handling. The SA-5000 maintains the performance of the vacuum tube by reducing the load on the vacuum tube by receiving a buffer between these load conditions and the vacuum tube.
Specifically, a wide-band current amplifier composed of FET / bipolar transistors is used as a buffer in all vacuum tube stages. This buffer has a role other than signal amplification to reduce the load, so that not only the true value of vacuum tubes can be displayed, but also various types of distortion can be reduced and reaction speed can be increased.
For signal amplification using a general vacuum tube, the grid side was used as an input. However, for voltage amplification stage of Phono and Line of SA-5000, a cathode input is used to maintain signal transfer and reduce distortion.
In addition to perfectly matching the vacuum tubes, by utilizing the complimentary service characteristics of the cathode input of one vacuum tube and the cathode output of the other vacuum tube, the distortion is canceled without using global feedback.
Two types of output can be selected : direct and buffer.
In the case of the direct output, the signal is output from the output tube only through the output capacitor. In the case of the buffer, it is output through the buffer amplifier of the line driver. The buffer output has a lower impedance than the direct output, so that stable transmission characteristics can be achieved even when the cable to the power amplifier is extended.
The power supply unit is a separate unit structure, eliminating interference with the power supply unit.
The power supply unit consists of 6CA4 rectifier tubes and constant voltage regulators, and is made of the same chassis material as the main unit.
DC power is supplied to this unit when the ready switch of the main unit is turned on. The main unit is designed to be always energized except for the high voltage supply of the heater, reducing stress to the vacuum tube and extending the life.
A chassis structure is adopted in which the mounting method of the board is thorough.
The main audio board is a 250x400mm, 3-mm-thick cold-rolled steel copper-plated sub-chassis with 13 screws in a floating structure that insulates the signal path from all physical vibrations, and components with vibrations are placed outside the board to eliminate microphonic noise caused by switches and relays.
The main chassis is made of the same solid aluminum as the front panel, and the copper-plated steel material of the sub-chassis can shield electromagnetic interference over a wide range of frequencies from 10 Hz to gigahertz.
With a total of 16 green LEDs on the audio board and one red LED on the control board, you can check the operation status of each part at a glance.
A 3-stage level control for the buffer output can be used to reduce the noise level during high-volume playback with high-efficiency horn speakers, or to reduce the total volume prior to volume adjustment.
In addition, it is equipped with a balance trimmer in which left and right channels are independent, so you can precisely adjust the balance of left and right channels.
Specs:
| Input sensitivity | Phono MC : 31 μ V
Phono MM:1.3mV
Line:37mV |
| Input impedance | Phono MC : 47k Ω, 300 Ω, 100 Ω, user set value
Phono MM : 47k Ω
Line : 15k Ω |
| Maximum input level | Phono MC:10mV
Phono MM:400mV
Line:12V |
| Output impedance | Direct output : 3.5k Ω
Buffer Output : 75 Ω
Tape Output : 10 Ω |
| Maximum output level | 32Vp-p (1% THD, 20 Hz to 20 kHz) |
| Gain (1 kHz) | Phono MC:84dB
Phono MM:52dB
Line:23dB |
| Distortion Factor (IHF) | Phono MC:
Phono MM:
Line: | 0.40% (20 Hz to 20 kHz)
0.09% (20 Hz to 4 kHz)
0.2% (20 Hz to 20 kHz)
0.035% (20 Hz to 4 kHz)
0.007% (20 Hz to 20 kHz) |
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| Frequency characteristic | Phono MC:
Phono MM:
Buffer Output :
Direct Output : | 10 Hz to 100 kHz + 0.1 -3dB
10 Hz to 80 kHz + 0. 1-0. 3 dB
10 Hz to 100 kHz + 0.1 -3dB
10 Hz to 80 kHz + 0. 1-0. 3 dB
2 Hz ~ 300 kHz + 0.0 -3.0 dB
8 Hz to 50 kHz + 0.0 -0.1 dB
10 Hz ~ 80 kHz + 0.0 -3.0 dB
20 Hz ~ 10 kHz + 0.0 -0.1 dB |
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| Signal-to-noise ratio (10 hz to 500 khz) | Phono MC : 80 dB (0.5 mV reference, EIA-WTD, 55 μ V noise)
Phono MM : 76 dB (5.0 mV reference, EIA-WTD, noise 30 μ V)
Line : 90 dB (0.5 V standard, EIA-WTD, noise 15 μ V) |
| Vacuum tube used | For Audio Amplification 6DJ8x4 pieces
6DJ8x2 for High Voltage Regulator
1 x 12AX7 for High Voltage Regulator Error Amplifier
Rectifier 6CA4x1 |
| Recommended fuse | Power Supply : 2-1/2A AGC 3 ag Size / Fast Blow Type
High Voltage : 1A8AG Size, Fast Blow Type |
| Pwer | 88 V ~ 133 V AC, 50Hz/60Hz |
| Power consumption | 55W (standby)
80W (operating) |
| External dimensions | Body : Width 483x Height 130x Depth 322 mm
Power Supply : 148 mm W x 130 mm H x 315 mm D |
| Weight | Body : 12.7 kg
Power supply : 5.5 kg |
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Flat Rate Shipping will include Very Secure Double-Box Packing with High-Quality packing materials and thick foam sheeting. This will also include insurance and "Adult Signature" Confirmation at the time of FedEx delivery.
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| Payment | Payment is expected within (3) days of the purchase date. |
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Shipping
Exception | Packages are shipped within 3 days of payment receipt (excluding Saturday/Sunday).
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| Disclaimer | We reserve the right to cancel any transaction where payment has not been received within this time frame; and will use the Buyer Request to Cancel Option. Thank You!
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