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CSPort GM70PA Stereo Power Amplifier
25.400,00 €
Vacuum tube type stereo power amplifier with direct heating triode GM70. Plate voltage 1,050 V, output 30 W+30 W. No-feedback technology creates a three-dimensional effect and a sense of presence, and expresses a clear sound.
Available on backorder
Excluding speakers & certain second hand items we offer:
- Free Shipping in Greece for orders over 100€!
- Free Shipping in Europe for orders over 1000€!
- Free Shipping Worldwide for orders over 3000€!
Description
Vacuum tube GM70
Equipped with vacuum tube GM70 with Pp=125 W. With a plate voltage of 1,050 V, 30 W+30 W (4 Ω) and 20 W+20 W (8 Ω) output, it can drive low efficiency speakers.
*Two models with graphite plate and copper plate.
Two-stage with C3g
Equipped with the ultra-reliable C3g, developed by Deutsche Telekom for telephone repeaters. The thin grid lines and large distance between electrodes enable high linearity amplification. The C3g is soldered directly onto the board to reduce noise at the contact point.
Large output transformers
The large output transformer developed exclusively for this product is installed. Multi-layer sandwich winding drives both small and large signals over a wide bandwidth. Low winding resistance and drive capability, so it has a damping factor of more than 5 despite being a no-feedback amplifier.
Dual and bridge mode
It can be used as a bi-amp to drive high and low frequencies in dual mono mode with one additional unit, or in bridge mode to drive the output at 1.5 to 2x.
These modes are available only with XLR balanced input.
Dual mono mode | Two GM70PAs drive the mid-high and low of the speakers |
Bridge mode | Two GM70PAs drive the Lch and Rch of the speakers |
Specifications
Output Power |
Normal, Dual mono |
30 W+30 W (4 Ω, THD5%) |
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---|---|---|---|
20 W+20 W (8 Ω, THD5%) |
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Bridge |
60 W (8 Ω, THD5%) |
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40 W (4 Ω, THD5%) |
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Frequency Response |
20 Hz-30k Hz -2 dB/10 W |
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THD |
Normal, Dual mono |
0.7%/10 W |
|
0.2%/1 W |
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Bridge |
0.5%/10 W |
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0.1%/1 W |
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NFB |
None |
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Signal to Noise Ratio |
90 dB/1 W (20 Hz-20k Hz) |
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Crosstalk |
40 dB/1 W (20 Hz-20k Hz) |
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Input Sensitivity |
Normal, Dual mono |
1 V/30 W (4 Ω) |
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1 V/20 W (8 Ω) |
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Bridge |
1 V/60 W (8 Ω) |
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1 V/40 W (4 Ω) |
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Gain |
21 dB |
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Input Terminal |
Unbalanced x1, Balanced x1 |
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Input Impedance |
2.5k Ω/1k Hz |
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Mode Switching |
By the rear rotary switch |
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Volume Adjustment |
None |
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Damping Factor |
2.8 (4 Ω) |
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5.6 (8 Ω) |
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Power Supply |
AC100/120/200/240 V, 50/60 Hz |
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Power Consumption |
400 W |
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Dimensions |
470W×201H×430D mm |
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Weight |
27 kg |
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Finishing |
Anodised aluminium |
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Accessories |
AC cords |
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Warranty Period |
5 years |
- The input impedance of this unit is 2.5k Ω. Please use a equipment with an output impedance of 500 Ω or less.
- The standard model is equipped with the GM70 graphite plate. (Model: GM70PA-G). A model with a copper plate (Model: GM70PA-C) is available as an option.
- Do not touch the vacuum tube as it is hot and may cause burns.
- Vacuum tubes are treated as consumables and are not covered by warranty.
- Dimensions do not include legs, knobs, or terminals.
- The appearance and specifications are subject to change without notice.
- Actual colors may differ from those in the photographs due to photography, lighting, etc.
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