Angel Pagan
Second Unit
- Joined
- Aug 15, 1998
- Messages
- 489
***I really couldn't decide where to post this since it involves both a receiver and speakers.***
I’ve also posted this on the AVS Forum because I’m really scratching my head over this. I’ve done searches on both forums and have come across answers to some questions. Let me start off by saying that I have a Pioneer 26TX receiver. I recently upgraded from Bose Acoustimass 5 speakers (they’re about 5 years old so they were probably Series 1) to Definitive Technology ProMonitor 80 speakers.
With the Bose speakers, I was able to play movies loud without any problems. Movies always sounded well especially after I replaced the Bose bass module with a Definitive Technology ProSub 80. But now, I’m having the same problem others have had with their receiver shutting down during high volume/heavy bass scenes. I can only go as high as -15 db when using a DTS track (-10 with DD).
Upon searching both forums, here’s what I came up with:
1-check speaker wires for short
I was using Monster flat speaker wires with the Bose (bare because of the spring clips) and initially used them when I purchased the Def Techs. When the problem first started, I switched to Home Depot 12 gauge speaker wire attached to Radio Shack Gold Series banana plugs (duals on the ProMonitors, singles on the receiver). Problem still occured so I don’t think it’s the wire.
2-make sure there is enough ventilation around receiver
I have my gear on a Standesign open-air rack. My receiver is on the top shelf and there is nothing sitting on top. That being said, my receiver runs hot and coupled with the fact that I don’t have a/c in my living room and it’s been an unbelievably hot summer in NY, it’s probably running hotter than normal. But, since I’ve never had a/c in the living room and the receiver never shut off with the Bose, I doubt that’s the problem. I should get a small electrical fan for the receiver, though.
3-low impedance loads
Here’s one which has me totally clueless. When checking the specs on the receiver’s manual, here’s what it says: “Continuous average power output of 100 watts per channel, min., at 8 ohms, from 20 Hz to 20,000 Hz with no more than 0.09% total harmonic distortion (front).” Huh?
The specs on the speaker’s manual read:
Frequency Response: 60 Hz-30 kHz
Efficiency: 89 dB
Nominal Impedance: Compatible with 4-8 ohm outputs
Driver Complement: A 4.5” cast basket bass-midrange driver and a 1” pure aluminum dome tweeter are perfectly blended by a complex, phase coherent Linkwitz-Riley crossover
Recommended Associated Amplification: 10-150 watts/channel
When I check the “Preparation” section of the manual, it states: “You can change the speaker impedance to suit the kind of speakers you have in your home system but we recommend using speakers with an impedance of 8-16 (the default setting). If you are using 6- less than 8 impedance speakers, you need to change the impedance setting. In general, use speakers with a nominal impedance between 6-16.”
So, I’ve tried changing the receiver to 6 ohms but still have the same results.
Now what?
Do I get a receiver that can go down to 4 ohms? Is there such a receiver?
or
Do I replace my speakers? I can always go back to the Bose as fronts and keep the Def Techs as rears. I’d rather not go with the Bose because of the bare wire/spring clip aspect. Then again, there’s no assurance that the same thing won’t happen with the Def Techs as rears. :frowning:
I’ve read where some members have recommended an external amp. Would this solve my problem? If so, how much for an average-priced one? My budget won’t allow for an expensive receiver/amp, so I’ll have to go budget on this one if need be.
Sorry for the rant. :b
Thanks,
Angel
I’ve also posted this on the AVS Forum because I’m really scratching my head over this. I’ve done searches on both forums and have come across answers to some questions. Let me start off by saying that I have a Pioneer 26TX receiver. I recently upgraded from Bose Acoustimass 5 speakers (they’re about 5 years old so they were probably Series 1) to Definitive Technology ProMonitor 80 speakers.
With the Bose speakers, I was able to play movies loud without any problems. Movies always sounded well especially after I replaced the Bose bass module with a Definitive Technology ProSub 80. But now, I’m having the same problem others have had with their receiver shutting down during high volume/heavy bass scenes. I can only go as high as -15 db when using a DTS track (-10 with DD).
Upon searching both forums, here’s what I came up with:
1-check speaker wires for short
I was using Monster flat speaker wires with the Bose (bare because of the spring clips) and initially used them when I purchased the Def Techs. When the problem first started, I switched to Home Depot 12 gauge speaker wire attached to Radio Shack Gold Series banana plugs (duals on the ProMonitors, singles on the receiver). Problem still occured so I don’t think it’s the wire.
2-make sure there is enough ventilation around receiver
I have my gear on a Standesign open-air rack. My receiver is on the top shelf and there is nothing sitting on top. That being said, my receiver runs hot and coupled with the fact that I don’t have a/c in my living room and it’s been an unbelievably hot summer in NY, it’s probably running hotter than normal. But, since I’ve never had a/c in the living room and the receiver never shut off with the Bose, I doubt that’s the problem. I should get a small electrical fan for the receiver, though.
3-low impedance loads
Here’s one which has me totally clueless. When checking the specs on the receiver’s manual, here’s what it says: “Continuous average power output of 100 watts per channel, min., at 8 ohms, from 20 Hz to 20,000 Hz with no more than 0.09% total harmonic distortion (front).” Huh?
The specs on the speaker’s manual read:
Frequency Response: 60 Hz-30 kHz
Efficiency: 89 dB
Nominal Impedance: Compatible with 4-8 ohm outputs
Driver Complement: A 4.5” cast basket bass-midrange driver and a 1” pure aluminum dome tweeter are perfectly blended by a complex, phase coherent Linkwitz-Riley crossover
Recommended Associated Amplification: 10-150 watts/channel
When I check the “Preparation” section of the manual, it states: “You can change the speaker impedance to suit the kind of speakers you have in your home system but we recommend using speakers with an impedance of 8-16 (the default setting). If you are using 6- less than 8 impedance speakers, you need to change the impedance setting. In general, use speakers with a nominal impedance between 6-16.”
So, I’ve tried changing the receiver to 6 ohms but still have the same results.
Now what?
Do I get a receiver that can go down to 4 ohms? Is there such a receiver?
or
Do I replace my speakers? I can always go back to the Bose as fronts and keep the Def Techs as rears. I’d rather not go with the Bose because of the bare wire/spring clip aspect. Then again, there’s no assurance that the same thing won’t happen with the Def Techs as rears. :frowning:
I’ve read where some members have recommended an external amp. Would this solve my problem? If so, how much for an average-priced one? My budget won’t allow for an expensive receiver/amp, so I’ll have to go budget on this one if need be.
Sorry for the rant. :b
Thanks,
Angel