The longer the cable, the thinner it is, the higher the impedance will be at the end.
Best,
E
Best,
E
Can This Amp Power A 50 Foot Speaker Cable Run?
I'd like to run 50-60 foot speaker cables of 12 AWG cable to a pair of 6 ohm speakers for the rear channels in my home theater.
Would 10 AWG be better? The specifications on the amp says 6 ohms is the minimum impedance that it will play safely. Do you see any issues with this? Does the amp below seem to be up to this task?
Stereo Amp Specs are as follows:
Dynamic Power Output: 2 × 140 Watts at 8 ohms
Total Harmonic Distortion: 0.08 % at rated power
IM Distortion: 0.08 % at rated power
Damping Factor: 100 at 8 ohms
Input Sensitivity and Impedance: 1 V, 50 kohms
Output Level and Impedance: 1 V, 10 kohms
Rated Speaker Impedance: 6 ohms MIN
Frequency Response: 10 Hz – 100 kHz, ±1 dB
Signal-to-Noise Ratio: 110 dB (IHF A, 0.5 V input)
____________________________________
Infinity Kappa 7.1 Speaker Specs are as follows:
Nominal Impedance: 6 ohms
Power Rating: 30 to 250 watts
RMS Crossover Frequencies: 500Hz, 4.5kHz
Frequency Response: 39Hz-35kHz +/-2dB
Sensitivity: 89dB 2.8V/1 meter
Would 10 AWG be better? The specifications on the amp says 6 ohms is the minimum impedance that it will play safely. Do you see any issues with this? Does the amp below seem to be up to this task?
Stereo Amp Specs are as follows:
Dynamic Power Output: 2 × 140 Watts at 8 ohms
Total Harmonic Distortion: 0.08 % at rated power
IM Distortion: 0.08 % at rated power
Damping Factor: 100 at 8 ohms
Input Sensitivity and Impedance: 1 V, 50 kohms
Output Level and Impedance: 1 V, 10 kohms
Rated Speaker Impedance: 6 ohms MIN
Frequency Response: 10 Hz – 100 kHz, ±1 dB
Signal-to-Noise Ratio: 110 dB (IHF A, 0.5 V input)
____________________________________
Infinity Kappa 7.1 Speaker Specs are as follows:
Nominal Impedance: 6 ohms
Power Rating: 30 to 250 watts
RMS Crossover Frequencies: 500Hz, 4.5kHz
Frequency Response: 39Hz-35kHz +/-2dB
Sensitivity: 89dB 2.8V/1 meter
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- 11 posts total
I ’m with zavato, the cable should be ok, most important thing to consider is the amp has enough power for such a big theater room without clipping and destroy the speakers! http://myhometheater.homestead.com/splcalculator.html |
Alternatively, if your inputs are truly balanced, run a balanced line instead, and put the amps near the speakers. +1 @mitch4t The amp won't have a problem driving the distance, but I think you will find that really long cables will rob the signal of detail and impact. In the case of cables that long, the difference between running a balanced line to the amps and then running really short speaker cables will be instantly obvious. |
Speaker cable if they have capacitance get get higher in capacitance the longer you go, an amp "if bordering" on becoming unstable, "can" go into oscillation with the higher capacitance of long cable runs. To cite an amp that was bordering on being unstable, the original Naim 250 in fact went into heavy oscillation and blew up as soon as it was turned on, when it saw the capacitance of Quad ESL 57's presented. Cheers George |
- 11 posts total