Inherited some audio equipment and need advice

[jcrowde3]

Guess I should add a caveat. Amplifiers have different input sensitivities. The Crown 460 is adjustable but the Hafler is not. The Hafler is rated at 1.55V on the input to generate 115W. The Onkyo manual says the Zone-B RCA out is rated at 1V, so you won't get the full 115W out of the Hafler, but at least you should not be able to overdrive it and damage the amp. Probably best not to push that old amp to full power any way.

Is there really any benefit to using any of the old amps? I just hooked the 4312s up to the onkyo and they sound pretty good.

 

[lovinthehd]

The similar rating specs between the Onkyo and Hafler are 80wpc vs 115wpc, so the Hafler has about a 1.6dB advantage there....didn't see lower impedance spec for the Hafler, possibly some differences there. The Onkyo alone should work well.

 

[jcrowde3]

The similar rating specs between the Onkyo and Hafler are 80wpc vs 115wpc, so the Hafler has about a 1.6dB advantage there....didn't see lower impedance spec for the Hafler, possibly some differences there. The Onkyo alone should work well.

Input Impedance: 47,OOO ohms.
Input Sensitivity: 1.55 volts rms for 1 15 watts into 8 ohms.
IM Distortion (SMPTE): Less than O.OOS’%, from 1 watt to 1 15 Damping Factor: 300 to 1 kHz into 8 ohms
watts into 8 ohms. 60 to 10 kHz into 8 ohms
Typical THD at 115 watts into 8 ohms:
I kHz - 0 0 02 5__ %
IO kHz - 0.007%
20 kHz - 0.012’/‘
Frequency Response into 8 ohms:
- 3 dB. 2 Hz to 160 kHz at 1 watt
+O, -0.5 dB, 6 Hz to 60 kHz at 1 15 watts
Rise Time: 10 kHz. 60 volts peak to peak square wave, 10%
to 90% 2.5 us.
Slew Rate: 10 kHz. 60 volts peak to peak square wave: 30 VI’,~ s.
Semiconductor Complement: 26 transistors. 8 power
Mosfets, 29 diodes, 4 zener diodes. 1 diode bridge.
Typical Channel Separation: 20 Hz:> 75 dB
1 kHz:>85 dB
20 kHz: >6S dB
Power Consumption: 1 15 watts into 8 ohm

 

[lovinthehd]

Input Impedance: 47,OOO ohms.
Input Sensitivity: 1.55 volts rms for 1 15 watts into 8 ohms.
IM Distortion (SMPTE): Less than O.OOS’%, from 1 watt to 1 15 Damping Factor: 300 to 1 kHz into 8 ohms
watts into 8 ohms. 60 to 10 kHz into 8 ohms
Typical THD at 115 watts into 8 ohms:
I kHz - 0 0 02 5__ %
IO kHz - 0.007%
20 kHz - 0.012’/‘
Frequency Response into 8 ohms:
- 3 dB. 2 Hz to 160 kHz at 1 watt
+O, -0.5 dB, 6 Hz to 60 kHz at 1 15 watts
Rise Time: 10 kHz. 60 volts peak to peak square wave, 10%
to 90% 2.5 us.
Slew Rate: 10 kHz. 60 volts peak to peak square wave: 30 VI’,~ s.
Semiconductor Complement: 26 transistors. 8 power
Mosfets, 29 diodes, 4 zener diodes. 1 diode bridge.
Typical Channel Separation: 20 Hz:> 75 dB
1 kHz:>85 dB
20 kHz: >6S dB
Power Consumption: 1 15 watts into 8 ohm

Yep. No 6 or 4 ohm rating tho.

 

[Eppie]

Yep. No 6 or 4 ohm rating tho.

From the manual:
Rated Output Power (IEC) (Others)
7 ch × 135 W at 6 ohms, 1 kHz, 1 ch driven of 1% THD
Maximum Effective Output Power (North American)
160 W at 6 ohms, 1 kHz, 1 ch driven of 10% THD
Maximum Effective Output Power (IEC)
7 ch × 160 W at 6 ohms, 1 kHz, 1 ch driven of 10% THD (European)
Maximum Effective Output Power (JEITA)
7 ch × 160 W at 6 ohms, 1 kHz, 1 ch driven of 10% THD (Asian and
Australian)
Dynamic Power (*)
* IEC60268-Short-term maximum output power
160 W (3 Ω, Front)
125 W (4 Ω, Front)
85 W (8 Ω, Front)

Speaker Impedance
4 Ω - 16 Ω

The Onkyo will be fine with those speakers.

 

[jcrowde3]

From the manual:
Rated Output Power (IEC) (Others)
7 ch × 135 W at 6 ohms, 1 kHz, 1 ch driven of 1% THD
Maximum Effective Output Power (North American)
160 W at 6 ohms, 1 kHz, 1 ch driven of 10% THD
Maximum Effective Output Power (IEC)
7 ch × 160 W at 6 ohms, 1 kHz, 1 ch driven of 10% THD (European)
Maximum Effective Output Power (JEITA)
7 ch × 160 W at 6 ohms, 1 kHz, 1 ch driven of 10% THD (Asian and
Australian)
Dynamic Power (*)
* IEC60268-Short-term maximum output power
160 W (3 Ω, Front)
125 W (4 Ω, Front)
85 W (8 Ω, Front)

Speaker Impedance
4 Ω - 16 Ω

The Onkyo will be fine with those speakers.

Wow! Thanks for digging that out!

 

[Eppie]

Wow! Thanks for digging that out!

https://www.onkyousa.com/wp-content/uploads/2019/08/TX-SR494_En.pdf if you want a PDF copy.

 

[lovinthehd]

From the manual:
Rated Output Power (IEC) (Others)
7 ch × 135 W at 6 ohms, 1 kHz, 1 ch driven of 1% THD
Maximum Effective Output Power (North American)
160 W at 6 ohms, 1 kHz, 1 ch driven of 10% THD
Maximum Effective Output Power (IEC)
7 ch × 160 W at 6 ohms, 1 kHz, 1 ch driven of 10% THD (European)
Maximum Effective Output Power (JEITA)
7 ch × 160 W at 6 ohms, 1 kHz, 1 ch driven of 10% THD (Asian and
Australian)
Dynamic Power (*)
* IEC60268-Short-term maximum output power
160 W (3 Ω, Front)
125 W (4 Ω, Front)
85 W (8 Ω, Front)

Speaker Impedance
4 Ω - 16 Ω

The Onkyo will be fine with those speakers.

I wasn't referring to the Onkyo's specs but rather the Hafler's. Onkyo generally does do the 6 ohm rating thing as well as dynamic power....

 

[jcrowde3]

Yep. No 6 or 4 ohm rating tho.

If I wanted to make these speakers sound the best they could. What route do I go? Do I get a power amp that can deliver more power?

Also, do speakers like these benefit from a sub or do you think they produce enough bass?

 

[lovinthehd]

If I wanted to make these speakers sound the best they could. What route do I go? Do I get a power amp that can deliver more power?

Also, do speakers like these benefit from a sub or do you think they produce enough bass?

If the Onkyo you have gets these speakers loud enough for your tastes without sounding bad you're probably fine now. Having a more powerful amp may lend some advantage in terms of headroom and higher spl (but keep in mind it takes a doubling of power to gain merely 3dB in spl, which isn't a lot). Adding a sub would take some of the load off the speakers (and avr to an extent) and can generally perform better than the lower bass capabilities of all but the best speakers (like maybe the JBL M2 you might not need a sub with); I do use subs with my 4311Bs which are fairly similar to the 4312s for bass; I do run mine off a more powerful avr than you have, but have had no need for a power amp for them in any case (and I have several I could use).