TSSA V4 and V8 buyers thread.
After a lot work around on the TSSA V4 control panel, the frontend is now ordered and we will receive the frontends end next week.
The front and powerboard is the same. The difference between the TSSA V4 and V8 is only the mosfets.
On the TSSA V8 the current capacity is the double of the TSSA V4. In numbers 63Apeak against 39Apeak. TSSA V8 will also have a bit higher damping factor.
Both amps can now handle +/-75VDC power supply as well as down to ~+/-30VDC. But because of the current capacity the V4 is best for 4 - 8Ohm speaker where the TSSA V8 can handle down to 2Ohm.
The best minimum idle current for TSSA V4 and V8 is 400mA and 800mA. For this reason TSSA V8 requires a larger heatsink.
Some have asked for use of hypex 1200/400 SMPS with this SMPS idle power consumption will at minimum bias for the TSSA V4 be 50W/channel and for the TSSA V8 be 100Watt per channel.
So the heatsink recommendation for using Hypex 1200/400 is:
TSSA V4 <0.6K/W per channel
TSSA V8 <0.3K/W per channel
The prices on the amplifier modules are
TSSA V4 will cost 314€/per channel. + shipping
TSSA V8 will cost 449€/per channel. + shipping
From 4 channel and up there is an discount of 30€ per channel
The early bird price which runs until the 12. june is.
TSSA V4 will cost 254€/per channel. + shipping
TSSA V8 will cost 389€/per channel. + shipping
And again there is an discount of 30€ per channel at 4 or more channels.
After a lot work around on the TSSA V4 control panel, the frontend is now ordered and we will receive the frontends end next week.
The front and powerboard is the same. The difference between the TSSA V4 and V8 is only the mosfets.
On the TSSA V8 the current capacity is the double of the TSSA V4. In numbers 63Apeak against 39Apeak. TSSA V8 will also have a bit higher damping factor.
Both amps can now handle +/-75VDC power supply as well as down to ~+/-30VDC. But because of the current capacity the V4 is best for 4 - 8Ohm speaker where the TSSA V8 can handle down to 2Ohm.
The best minimum idle current for TSSA V4 and V8 is 400mA and 800mA. For this reason TSSA V8 requires a larger heatsink.
Some have asked for use of hypex 1200/400 SMPS with this SMPS idle power consumption will at minimum bias for the TSSA V4 be 50W/channel and for the TSSA V8 be 100Watt per channel.
So the heatsink recommendation for using Hypex 1200/400 is:
TSSA V4 <0.6K/W per channel
TSSA V8 <0.3K/W per channel
The prices on the amplifier modules are
TSSA V4 will cost 314€/per channel. + shipping
TSSA V8 will cost 449€/per channel. + shipping
From 4 channel and up there is an discount of 30€ per channel
The early bird price which runs until the 12. june is.
TSSA V4 will cost 254€/per channel. + shipping
TSSA V8 will cost 389€/per channel. + shipping
And again there is an discount of 30€ per channel at 4 or more channels.
Attachments
Last edited:
Early bird TSSA V4:
Myint67 TSSA v4 x 4 modules
Vitalica TSSA v4 x 2 modules (Paid)
rogerchou TSSA V4 x 2 modules (Paid)
hop.sing TSSA V4 x 2 modules (Paid)
Please let me know if i have forgotten some members...
BR Sonny
Myint67 TSSA v4 x 4 modules
Vitalica TSSA v4 x 2 modules (Paid)
rogerchou TSSA V4 x 2 modules (Paid)
hop.sing TSSA V4 x 2 modules (Paid)
Please let me know if i have forgotten some members...
BR Sonny
Technical specs of the TSSA V4 and V8
- Size : 170x70x59 LxWxH
- +/-30 - +/-75VDC supply voltage
- 1.3MHz Bandwidth
- Current capacity 39/63Apeak for V4/V8
- 8 Mosfet per channel (V4 = single die, V8 = dual die)
- Minimum idle current 0.4A/0.8A for TSSA V4/V8
- Input can be single ended or balanced
- All discrete amplifier stages. Input build around two discrete opamps
- Low noise regulators
- Connector for external Solidstate relay with DC sense autoshutoff
- Power rating at +/-75vdc
8R = 310W (V4/V8)
4R = 620W (V4/V8)
2R = 1070W (V8)
1R = 1800W (V8)
Sonny, thank you very much. According to your suggestion of heatsinks, I guess V4 is not as hot as TSSA 1.7 at the same bias current. May I set bias current higher? 0.8~1A?
The heatsink gets exactly as hot as with tssa V1.7 and V1.8...
The difference is that the heatrise In the mosfet is Shared between 4 mosfet and 4 isolation pads. So the resulting temperature margin is better.
I hope it makes sense to you?
BR Sonny
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The difference is that the heatrise In the mosfet is Shared between 4 mosfet and 4 isolation pads. So the resulting temperature margin is better.
I hope it makes sense to you?
BR Sonny
Sent from my iPhone using Tapatalk
Early bird TSSA V4:
Myint67 TSSA v4 x 4 modules
Vitalica TSSA v4 x 2 modules (Paid)
rogerchou TSSA V4 x 2 modules (Paid)
hop.sing TSSA V4 x 2 modules (Paid)
Pinnocchio TSSA V4 x 2 modules
Sperrey TSSA V4 x 6 modules
Please let me know if i have forgotten some members...
Control panel assembly today: We will continue tomorrow.
BR Sonny
Myint67 TSSA v4 x 4 modules
Vitalica TSSA v4 x 2 modules (Paid)
rogerchou TSSA V4 x 2 modules (Paid)
hop.sing TSSA V4 x 2 modules (Paid)
Pinnocchio TSSA V4 x 2 modules
Sperrey TSSA V4 x 6 modules
Please let me know if i have forgotten some members...
Control panel assembly today: We will continue tomorrow.
BR Sonny
Attachments
Early bird TSSA V4:
Myint67 TSSA v4 x 4 modules
Vitalica TSSA v4 x 2 modules (Paid)
rogerchou TSSA V4 x 2 modules (Paid)
hop.sing TSSA V4 x 2 modules (Paid)
Pinnocchio TSSA V4 x 2 modules
Sperrey TSSA V4 x 6 modules
Catal TSSA V4 x 2 modules
Frank
Myint67 TSSA v4 x 4 modules
Vitalica TSSA v4 x 2 modules (Paid)
rogerchou TSSA V4 x 2 modules (Paid)
hop.sing TSSA V4 x 2 modules (Paid)
Pinnocchio TSSA V4 x 2 modules
Sperrey TSSA V4 x 6 modules
Catal TSSA V4 x 2 modules
Frank
It is easy to set at 50mA - 75mA per device. 200 - 300mA idle In total.
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
It works well with a test supply of 32V at the moment. Heatsink is 42 celcius small heatsink is 53 celcius so they will most likely go from 25 to 35mm height.
Tomorrow we will raise voltage to about 42V .
Main heatsink is by the Way an SK56 In 75mm height.
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Sorry for my absence, but the frontend need a small tweak to work as i wanted it to.
I have attached screen shots from the scope.
The frontend work with 2x gain. Second stage works with 11x gain for V4/V8.
The frontend screenshot is record at 200KHz.
So we will continue assembling the amps now. As this goes on i will upload some more pictures with low ohm load behavior.
I have attached screen shots from the scope.
The frontend work with 2x gain. Second stage works with 11x gain for V4/V8.
The frontend screenshot is record at 200KHz.
So we will continue assembling the amps now. As this goes on i will upload some more pictures with low ohm load behavior.
Attachments
We have done some power measurement on a 500VA potted noratel toroid with 2x35VAC secondary windings. 4x15.000uF:
Idle: +/-50VDC
8R +/-50VDC : 120Watt
4R +/-48VDC : 200Watt
2R +/-43VDC : 300Watt (PSU voltage fall when load current is increased) approx 13Vpeak drop into 2Ohm load.
Current limit into an 0.5Ohm load: 36Apeak.
Small signal bandwidth : 1MHz.
Input impedance : 10K
Idle: +/-50VDC
8R +/-50VDC : 120Watt
4R +/-48VDC : 200Watt
2R +/-43VDC : 300Watt (PSU voltage fall when load current is increased) approx 13Vpeak drop into 2Ohm load.
Current limit into an 0.5Ohm load: 36Apeak.
Small signal bandwidth : 1MHz.
Input impedance : 10K