Div Posted November 25, 2023 Share Posted November 25, 2023 I paired the HCA-1206 135wpc with RF7+RC7+RS7 and they are all clipping after decent volume. I have pre-out from denon connected to each terminal.. i know this speakers are efficient and should do just fine but i cant figure out why they clipp.. what are things i can check to insure amp is working at optimum level .. or is the amp just too weak ? Any help will be appreciated .. all the amp switch in back are set to off for all 6 channels operation..hope i didnt make mistake buying this amp.. btw i tested RC 7 on avr only and the are fine .. all speakers are healthy Quote Link to comment Share on other sites More sharing options...
Ceptorman Posted November 25, 2023 Share Posted November 25, 2023 It could be an impedance issue....this is from the HCA manual........ You may connect loudspeakers with a 4 Ω or 8 Ω nominal impedance for unbridged operation. Your HCA-1206 is capable of driving speakers with occasional impedance dips well below 2 Ω. However, Lower nominal impedance loads are not recommended and may cause overheating. Have you tried connecting the speakers directly to the AVR? Quote Link to comment Share on other sites More sharing options...
OO1 Posted November 25, 2023 Share Posted November 25, 2023 distortion is too high Quote Link to comment Share on other sites More sharing options...
Div Posted November 25, 2023 Author Share Posted November 25, 2023 @Ceptorman I tried and then they work just fine so i am not sure what's the issue . my AVR is 120 watts x 7 and HCA-1206 is 135 watts x 6.. i was hoping independent amp per channel would improve things.. i think i am doing something wrong but i can't seem to figure out. May be Pre-out is no good ? Quote Link to comment Share on other sites More sharing options...
Ceptorman Posted November 25, 2023 Share Posted November 25, 2023 It could be something as simple as a bad speaker wire connection, or a bad cable going to the amp. After inspecting all the wires and cables, you might try switching cable and wires around. You might try the towers alone, then add the center, try the center and surround speakers. Even though those speakers are rated at 8 ohm, they do like to have plenty of power, and all of those speakers at once might be overtaxing the amp. Curious, when using the amp, does it sound any different until it clips than just using the AVR? Does it seem to have more bass or more headroom? And are you sure your AVR has 7 channels of pre-outs? Quote Link to comment Share on other sites More sharing options...
wuzzzer Posted November 25, 2023 Share Posted November 25, 2023 What level do you have the output trim level of your speakers in the receiver’s menu? Quote Link to comment Share on other sites More sharing options...
Ceptorman Posted November 25, 2023 Share Posted November 25, 2023 Maybe just amp your LCR and let Audyssey set the parameters. Quote Link to comment Share on other sites More sharing options...
Div Posted November 25, 2023 Author Share Posted November 25, 2023 @Ceptorman i will try the audyssey ..speaker sound about same infact i felt avr soubd better then amp. I am new to this so any basic thing i may be missing.. i havent ground my amp to say water pipe in the house .. @wuzzzer what donyou mean by trim level .. only thing i setup was. Size of speaker and set everything to 0db for gains in reciver Quote Link to comment Share on other sites More sharing options...
wuzzzer Posted November 25, 2023 Share Posted November 25, 2023 27 minutes ago, Div said: @Ceptorman i will try the audyssey ..speaker sound about same infact i felt avr soubd better then amp. I am new to this so any basic thing i may be missing.. i havent ground my amp to say water pipe in the house .. @wuzzzer what donyou mean by trim level .. only thing i setup was. Size of speaker and set everything to 0db for gains in reciver Trim or gain, same thing. Just wanted to make sure you weren’t in the positive for that. Try turning down the gains to -5dB for each channel and then see if you get the same distortion at higher volumes. Quote Link to comment Share on other sites More sharing options...
Div Posted November 25, 2023 Author Share Posted November 25, 2023 will try tks Quote Link to comment Share on other sites More sharing options...
Div Posted November 25, 2023 Author Share Posted November 25, 2023 @Ceptorman @wuzzzer do i have to convert the pre out to somethibng diffrent for this amp .. i have simply connected preout to amp .. any setti g i need to enable for preout usage ? Quote Link to comment Share on other sites More sharing options...
Div Posted November 25, 2023 Author Share Posted November 25, 2023 Just now, Div said: @Ceptorman @wuzzzer do i have to convert the pre out to somethibng diffrent for this amp .. i have simply connected preout to amp .. any setti g i need to enable for preout usage ? I am using standard monster audio rca cable Quote Link to comment Share on other sites More sharing options...
Ceptorman Posted November 25, 2023 Share Posted November 25, 2023 It's either connected correctly or it's not. I meant you might try unplugging some cables or wires to identify if a wire was bad. Try just the center channel, then the towers, maybe switch the wires around to see if any other combination has a different result. If it plays fine with the AVR only, then you add the amp, but then it clips, it's either the amp or the wiring to or from the amp. I have a feeling the amp can't handle all of the speakers. Maybe use the amp to power the towers only, then try the LCR, something will become noticeable and clip the speakers. This is all trial and error. Quote Link to comment Share on other sites More sharing options...
wuzzzer Posted November 26, 2023 Share Posted November 26, 2023 2 hours ago, Div said: @Ceptorman @wuzzzer do i have to convert the pre out to somethibng diffrent for this amp .. i have simply connected preout to amp .. any setti g i need to enable for preout usage ? No, there shouldn’t be. Quote Link to comment Share on other sites More sharing options...
Div Posted November 26, 2023 Author Share Posted November 26, 2023 Thank you guys for now just switched them to AVR and will try bridging amp to mono for Left and right. Dont have Y cable handy when you need them lol.. gn 1 Quote Link to comment Share on other sites More sharing options...
The Dude Posted November 26, 2023 Share Posted November 26, 2023 I'd don't see why that amp couldn't handle those speakers, unless there is something wrong with it. I know there was a series of those amps that had a relay issue. I'd reach out to Parasound and see what they say. 1 Quote Link to comment Share on other sites More sharing options...
jjptkd Posted November 26, 2023 Share Posted November 26, 2023 53 minutes ago, Div said: Thank you guys for now just switched them to AVR and will try bridging amp to mono for Left and right. Dont have Y cable handy when you need them lol.. gn I was going to suggest running the center and surrounds off the AVR and bi-amp the RF-7's with the Parasound those towers will eat up a lot of power Quote Link to comment Share on other sites More sharing options...
wuzzzer Posted November 26, 2023 Share Posted November 26, 2023 2 hours ago, Div said: Thank you guys for now just switched them to AVR and will try bridging amp to mono for Left and right. Dont have Y cable handy when you need them lol.. gn Don’t bridge the amp. Most amps don’t like lower impedance loads while bridged, plus their THD goes up. 1 Quote Link to comment Share on other sites More sharing options...
Ceptorman Posted November 26, 2023 Share Posted November 26, 2023 14 hours ago, wuzzzer said: Don’t bridge the amp. Most amps don’t like lower impedance loads while bridged, plus their THD goes up. ^^THIS^^ I have a bridgeable Emotiva 500x2 amp, I wanted to get another amp and use them as mono blocks, the owner of Emotiva advised me against this as my speakers are 4ohm. Quote Link to comment Share on other sites More sharing options...
Zen Traveler Posted November 30, 2023 Share Posted November 30, 2023 On 11/25/2023 at 12:28 PM, Div said: I tried and then they work just fine so i am not sure what's the issue . I would go back to hooking them up to the AVR and take the external amp out of the system. Quote Link to comment Share on other sites More sharing options...
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