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lovemusic's picture
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Marantz PM6004 problem running my speakers

Hi everyone, I'm new here, thanks in advance for any help you can offer.

 

In brief, my Hubby and I, are both bonkers about music and between us we've had that much hifi stuff we cannot remember all of it lol.

 

Yesterday we decided we would buy a brand new Marantz PM6004 amp and the matching CD6004 cd player to upgrade from the Yamaha amp and matching cd player we were using in our lounge. Prior to these purchases we usually run vintage stuff. We currently have various amps and hifi stuff along with speakers etc, we just wanted to get a bit more clarity, so decided on the Marantz for that room.

 

We setup with PM6004 and CD6004 to run with our two pairs of matching Dali 505 speakers. Sounded great however, when we tried to listen to the system at around the 10-11 am position on the volume control, the amp kept going in to mute mode, turning the volume control down to zero and then resetting to play after several sections (but with the volume at zero) We understand that the Marantz has a protection system on it, but surely it cannot be that sensitive to the 4ohm speakers we have can it? Wasn't really loud at that volume, but if we put on the loudness or a bit more bass it knocked out sooner.

 

There's nothing wrong with our speakers, they've been used on various amps, large and small without any problems. The speaker wire is new however it is just speaker wire, nothing fancy. Although, we've never had a problem before with using that type of wire on any of our gear.

 

We talked to the Hifi store and they suggested a bigger amp, we were refunded for the two Marantz items and we are back to square one. Not really fancying anymore Marantz gear if this could happen again.

 

Back to running our four Dali 505's and our Yamaha AX396 and Yamaha CDX480. OK, old stuff that isn't high value but is OK. We would like something with more clarity/detail though, hence the Marantz purchase.

 

Thanks for any help you can offer.

toyota man's picture
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RE: Marantz PM6004 problem

lovemusic wrote:

Hi everyone, I'm new here, thanks in advance for any help you can offer.

 

In brief, my Hubby and I, are both bonkers about music and between us we've had that much hifi stuff we cannot remember all of it lol.

 

Yesterday we decided we would buy a brand new Marantz PM6004 amp and the matching CD6004 cd player to upgrade from the Yamaha amp and matching cd player we were using in our lounge. Prior to these purchases we usually run vintage stuff. We currently have various amps and hifi stuff along with speakers etc, we just wanted to get a bit more clarity, so decided on the Marantz for that room.

 

We setup with PM6004 and CD6004 to run with our two pairs of matching Dali 505 speakers. Sounded great however, when we tried to listen to the system at around the 10-11 am position on the volume control, the amp kept going in to mute mode, turning the volume control down to zero and then resetting to play after several sections (but with the volume at zero) We understand that the Marantz has a protection system on it, but surely it cannot be that sensitive to the 4ohm speakers we have can it? Wasn't really loud at that volume, but if we put on the loudness or a bit more bass it knocked out sooner.

 

There's nothing wrong with our speakers, they've been used on various amps, large and small without any problems. The speaker wire is new however it is just speaker wire, nothing fancy. Although, we've never had a problem before with using that type of wire on any of our gear.

 

We talked to the Hifi store and they suggested a bigger amp, we were refunded for the two Marantz items and we are back to square one. Not really fancying anymore Marantz gear if this could happen again.

 

Back to running our four Dali 505's and our Yamaha AX396 and Yamaha CDX480. OK, old stuff that isn't high value but is OK. We would like something with more clarity/detail though, hence the Marantz purchase.

 

Thanks for any help you can offer.

the problem is due to speaker impedence i don't think the amp is able to run 2 pairs of speakers not much help I know I am sure some one will be able to help with this one :cheers:
lovemusic's picture
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RE: Marantz PM6004 problem

Arhh right, thanks for that. The amp has two sets of speakers ports plus and A and B speaker buttons and the instructions say it can run speakers from 4-16ohms. We specially looked for an amp that would take two sets of speakers. The speaker instructions say they can run on amps from 30 to 150 Watts. I wonder if the two sets combined caused the over-load in some way. Sounded great otherwise, just couldn't lisen at a reasonable volume.

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RE: Marantz PM6004 problem

 It sounds like maybe you can indeed run 2 pairs of speakers I had a quick look on the net and there was no mention of that feature this would suggest maybe a short or something  Smile 

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RE: Marantz PM6004 problem

Thanks Smile it is a bit of a puzzler. All we could come up with is that it could be the two pairs of speakers together have dropped this impedance in some way, causing the amps protection to cut in . Or there was a fault with the amplifier.  As a test we changed the speaker wire for fresh, made all the wires the same length etc, still it was cutting out. Tried both sets of speakers on together, then one set on, then the other set on etc. This went on into the small hours lol, different types of music as well.

We could have tried it with some of our other speakers, we didn't though, too fed-up that it wouldn't run the intended speakers and didn't want to damage the units or the speakers.

 

 

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RE: Marantz PM6004 problem

Hi I am sure that some one will know the aswer to your problem but you did all of the things I would have done  but you get to the point when enough is enough and you have to call it a day

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RE: Marantz PM6004 problem

Lol, I reached that enough point quite early on with this amp! I said take the amp off the system and box it back up and talk to the shop, after about two hours. Hubby tried to not be beaten, more patients than me lol. It sounded so nice and it was hard to believe we couldn't get it to run, so he tried not to give up on it. After talking to the shop staff, they suggested the only thing to do was to buy a larger amp.

 

After all, it really got my goat when it cut off at the start of the bass section of the live Hotel California track, one of my all time favourites, will not do lol.

 

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RE: Marantz PM6004 problem

The Dali 505 are rated as 4ohms?

If so, if you check the PM6004 specs, when using A+B output to drive 2 pair of speakers, they should be rated at 8 to 16ohms.

So if that is the case, there is nothing wrong with the PM6004.

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RE: Marantz PM6004 problem

Your speakers are 4 ohm impedance and your amplifier will only take one pair of 4 ohm speakers. Two pairs give a load of 2 ohms as the A and B outputs on the amplifier are in parallel. It probably says on the back of the amplifier speaker A + B 8-16 ohms meaning the minimum impedance for both outputs is 8 ohms. 

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RE: Marantz PM6004 problem

lovemusic wrote:

Lol, I reached that enough point quite early on with this amp! I said take the amp off the system and box it back up and talk to the shop, after about two hours. Hubby tried to not be beaten, more patients than me lol. It sounded so nice and it was hard to believe we couldn't get it to run, so he tried not to give up on it. After talking to the shop staff, they suggested the only thing to do was to buy a larger amp.

 

After all, it really got my goat when it cut off at the start of the bass section of the live Hotel California track, one of my all time favourites, will not do lol.

 

I mavn't heard the live hotel california I have the original cd release and the vynle  i take it this live version is realy gooooood I will have a listen if i can find it Ive got £50 hmv vouchers to spend joy of joy i am just waiting to get a job near a hmv so i can sneak off and do a bit of shopping I often get into hmv norwich  buryst edmunds and cambridge and just before christmas i got into nottingham but could not find hmv
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RE: Marantz PM6004 problem

cstanwhf wrote:

The Dali 505 are rated as 4ohms?

If so, if you check the PM6004 specs, when using A+B output to drive 2 pair of speakers, they should be rated at 8 to 16ohms.

So if that is the case, there is nothing wrong with the PM6004.

 

Really,  thanks for that. We couldn't see that in the Marantz manual. The Marantz manual suggested speakers between 4-16ohms, we also told the shop what we were running and that we would be running two matched pairs before we purchased the amplifier, we even took a pair of the speakers in with us to test the amp on. Shame we didn't know that. Even so, if that is the case, this wasn't the amplifier for us, we don't want to give up a pair of speakers.

That wouldn't explain that fact that we could get the amp to cut out with just one set of speakers on it though.

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RE: Marantz PM6004 problem

eggontoast wrote:

Your speakers are 4 ohm impedance and your amplifier will only take one pair of 4 ohm speakers. Two pairs give a load of 2 ohms as the A and B outputs on the amplifier are in parallel. It probably says on the back of the amplifier speaker A + B 8-16 ohms meaning the minimum impedance for both outputs is 8 ohms. 

 

Thanks, just seen your post. That would explain it, I only wish this had come to light before we bought the amplifier. We thought we had covered all the bases with checking the amp and speakers and checking with the shop prior to purchase and even testing the speakers. Looks like I should have downloaded the instructions manual before purchase.

 

Any suggestions for how we managed to get the unit to cut out with just one pair of speakers on?

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RE: Marantz PM6004 problem

toyota man wrote:

lovemusic wrote:

Lol, I reached that enough point quite early on with this amp! I said take the amp off the system and box it back up and talk to the shop, after about two hours. Hubby tried to not be beaten, more patients than me lol. It sounded so nice and it was hard to believe we couldn't get it to run, so he tried not to give up on it. After talking to the shop staff, they suggested the only thing to do was to buy a larger amp.

 

After all, it really got my goat when it cut off at the start of the bass section of the live Hotel California track, one of my all time favourites, will not do lol.

 

I mavn't heard the live hotel california I have the original cd release and the vynle  i take it this live version is realy gooooood I will have a listen if i can find it Ive got £50 hmv vouchers to spend joy of joy i am just waiting to get a job near a hmv so i can sneak off and do a bit of shopping I often get into hmv norwich  buryst edmunds and cambridge and just before christmas i got into nottingham but could not find hmv

 

You've not lived if you've not heard the live version of Hotel California lol, don't know which live version we have though, it is an extended with lots of bass at the beginning. That and the Boys of Summer, another must have Don Henley for me!

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RE: Marantz PM6004 problem

lovemusic wrote:

eggontoast wrote:

Your speakers are 4 ohm impedance and your amplifier will only take one pair of 4 ohm speakers. Two pairs give a load of 2 ohms as the A and B outputs on the amplifier are in parallel. It probably says on the back of the amplifier speaker A + B 8-16 ohms meaning the minimum impedance for both outputs is 8 ohms. 

 

Thanks, just seen your post. That would explain it, I only wish this had come to light before we bought the amplifier. We thought we had covered all the bases with checking the amp and speakers and checking with the shop prior to purchase and even testing the speakers. Looks like I should have downloaded the instructions manual before purchase.

 

Any suggestions for how we managed to get the unit to cut out with just one pair of speakers on?

The information is written on the back of the PM6004 amp.

Just as you should see this on the back of your Yamaha amp(where the swich for the impedance is).

When testing just one pair of Dali 505, you did remove the other spare pair of speaker cable right? Since the speakers are single wired.

If left connected and the other end touches something conductive or each other, the protection circuit will activate too.

And you did disengage one of the speaker output by pressing the speaker A or B button on the front of the PM6004?

If not, it is still rated as 8 to 16ohms per output.

Anyway, you have returned the PM6004.

Try to look for an amp with higher output (the PM6004 is 45W, your current Yamaha is 60W) and higher current delivery.

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RE: Marantz PM6004 problem

Just put Hotel california on I never noticed the bass before mind you I haven't listen to it for years  :cheers: :cheers: Dance 4

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RE: Marantz PM6004 problem

Hey, I just love the bass at the beginning before the singing starts, more on the live version we have than the normal LP version. It doesn't sound the same on other speakers we have on our other setups, just has a lovely deep echo on the Dalis, sounded brilliant on the PM6004 too, a bit better than the Yamaha we are now back to for the time being.

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