How to remove tweeter from Polk r600

elmm75 · June 30

msg · June 30

You're gonna do well here.

SeleniumFalcon · June 30

Hello,
Welcome! I'll ask a friend at Polk for the recommended tweeter removal steps. I'll probably hear back on Monday.

VR3 · June 30

The ring is held on with double sided tape.

Have to slowly heat up and pry away and then it will reveal the screws

VR3 · July 2

Fwiw the tweeters when you order them come with new plates as they are easy to damage in removal

msg · July 8

I just wanna know if the new tweeters still work.

elmm75 · June 30

I am a new member here and I love my Polk speakers. I had picked up 1R600 from eBay for 150 and it had a tiny dent on back right corner. Heck of a deal. So I picked up another one that was open box from safe and sound. Within 5 minutes of playing I tuned the volume up and instantly both of my tweeters fried in both of my R600. Idk what happened. I had been playing the one r600 from eBay for a couple weeks and running a lsim703 on the right till I got my safe and sound r600. I just don’t understand what could have caused this

Viking64 · June 30

I'll just have a seat right here and wait for elmm75 to show us "how to remove tweeter from Polk r600".

Gardenstater · June 30

Well first question is how loud did you turn it up, like past 12 oclock? What is your power source?

Usually the common belief is that something must be wrong with your amplifier for this to happen.

There are certainly members here who have removed tweeters in the L series and R series recently and can advise.

elmm75 · June 30

I have an anthem mrx720 and use it as preamplifier into smsl su9 pro to an emotiva a300. Turned it up about 67% of max volume.

msg · June 30

What is max volume? What is the scale?

elmm75 · June 30

Geeez if you don’t understand what the scale is of 67% u need more help than I do. Lmao

treitz3 · June 30

LOL...

@elmm75....while I cannot answer your query? Others can.

Sometimes, it takes a while for someone to chime in that has experience with this. With that said...

Please allow me to offer you a very warm welcome to Club Polk.

Tom

SeleniumFalcon · July 1

@VR3 is right on the mark, as usual. My friend sent along this drawing:

Emlyn · July 2

I understand the vanity ring for the tweeter is also magnetic (likely lightly glued/taped as well) while the one of the midwoofer is held in by pins and easily removed. I have removed the ring for the midwoofer but haven't tried the ring for the tweeter. I have heard that the ring for the tweeter is somewhat difficult to remove without marring the cabinet.

Once either is removed it's just a normal set of screws holding the drivers in the cabinet.

Clipdat · July 2

Why even bother swapping out the tweeters though if you're just going to blow them again?

elmm75 · July 3

Thanks

Clipdat · July 3

You're welcome.

treitz3 · July 3

What kind of source and amplification are you running?

Tom

pitdogg2 · July 3

elmm75 wrote: »

I have an anthem mrx720 and use it as preamplifier into smsl su9 pro to an emotiva a300. Turned it up about 67% of max volume.

Tom ^^^
I'm not sure what this smsl su9 pro is honestly

Emlyn · July 3

The SMSL SU9 is a decent quality budget DAC. The Emotiva A300 is a decent quality budget amplifier around 150 watts per channel.

Neither by themselves should contribute to damaging tweeters in R600s in normal usage.

pitdogg2 · July 3

@Emlyn running the A300 at 67% could cause problems one would think. Depending on the music you're probably real close to running out of gas.

F1nut · July 3

running the A300 at 67% will absolutely cause blown tweeters

Fixed it.

Clipdat · July 4

"I have an anthem mrx720 and use it as preamplifier into smsl su9 pro to an emotiva a300."

According to his original post he's running an AVR as a preamp (how? its digital out??) into a SMSL DAC, and then into an entry-level Emotiva amplifier with the following specs.

Type: Solid-state stereo amplifier
Power Output (two channels driven)
150 watts RMS per channel; 20 Hz - 20 kHz; THD < 0.1%; into 8 Ohms
300 watts RMS per channel; 1 kHz; THD < 1%; into 4 Ohms
Power Band width: 20 Hz to 20 kHz (+ / - 0.07 dB).
Broad Band Frequency Response: 5 Hz to 80 kHz (+ / - 1.8 dB).
THD + noise: < 0.02% (A-weighted); at rated power; 1 kHz; 8 Ohms
Signal to Noise Ratio (8 Ohm load)
> 120 dB (A-weighted); ref rated power.
> 100 dB (A-weighted); ref 1 watt.
Minimum Recommended Load Impedance:
4 Ohms; which equals one 4 Ohm load or two paralleled 8 Ohm loads.
Damping Factor (8 Ohm load): > 500.
Power Supply: Linear power supply with heavy duty toroidal transformer.
Input Sensitivity (for rated power; 8Ohm load): 1.2 V.
Gain: 29 dB.
Dimensions: 17" x 4" x 15.5" (WxHxD not including connectors)
Weight: 25.2 lbs.
Price: $399

But yeah not clear on the AVR into a DAC thing. Don't do that!

VR3 · July 4

that receiver does have pre outs it seems

Clipdat · July 4

Optical out of the Anthem into the DAC?! Makes no sense and might clip your digital output level and mess up everything downstream.

VR3 · July 4

Yeah not sure about running a 5.1 receiver with a 2 channel dac, can't say I hehe done that one before

Clipdat · July 4

Either run the SMSL DAC straight into the amp using the variable volume control, or run the DAC's fixed line level output into one of the AVR's analog inputs.

msg · July 4

Emlyn · July 4

I'm not sure there's much to be gained by using the Emotiva amp if the system is just stereo. That Anthem receiver has a decent amp section in it and the R600s aren't difficult speakers to drive.

My guess is the "67 percent" is referring to the receiver's volume display set to show absolute volume (min or zero to max) rather than relative (minus something to 0 as the THX 75dB dialog level). A 67 volume level on an AV receiver set to show absolute volume isn't usually very loud. In analog audio a volume knob set at 67 percent of max (2 or 3 o'clock for example) would be very loud and enough to damage speakers. It's also true that Emotiva amps used to have relatively high output gain so if the AV receiver based system isn't properly set up to a 75dB reference level it's possible what the volume display is showing isn't showing what the amplifier downstream is outputting to the speakers.

msg · July 4

A guess, yes, and same with my first response without looking up the manual to determine context.

I did ref the Anthem manual yesterday eve - the range and scale doesn't appear to be specified, btw.

Yeap, and for the sake of additional examples, I've seen volume controls on AVRs and pre/processors with 0-100 - what seems like some general arbitrary range - and another with -90 to +112 for a dB scale, 0 being reference on that particular unit.

Not knowing at the time what kind of gear is or volume control this Anthem uses, it wasn't possible to determine whether volume was e damaging factor, though either way pretty obvious it was, regardless of the setup. The question is, what can be reviewed and adjusted/learned with the setup.

My initial thought was that if it were a 2ch piece with an analog volume control, "67%" of total travel - if that figure were an off the cuff estimate - would be way into red range for most units, not to mention uncomfortably loud if not eased up to it over a long listening session. Hearing damage levels for most, regardless, if sustained. Easy to see how tweeters could have been damaged in this case, the obvious solution the next go round being to turn it down.

The effort was early info gathering in the attempt to assist, the presumption being that 67 was either a displayed 67 with the owner either knowing or assuming 100 max level, or an estimate of volume level. Either was meaningless without more info or context of the control type and scale, or even the range. 98.7% of people throw percentage stats around probably 43% of the time. This is a fact. One I just made up, but a fact nonetheless.

The description of connections doesn't make sense.

Connections are more clearly described by signal flow from source to destination. I agree, the DAC should be in front of the Anthem, yes.
Otherwise, as noted above, there would likely be an additional variable level control in place, unless one of the devices is set to fixed output level, possible in some cases. Anyway, this part doesn't make sense at all, since it would be like a preamp into a preamp for some reason. No mention of the source devices in use that I could see on last update skim.

I was also wondering whether any of the pieces in the mix have gain controls. This is a factor even when properly connected.

OP might check Anthem inputs, the amp, and the DAC for respective gain controls and see that they're defaulted. If the devices are not new, would suggest factory reset of all components as best practice.

The reason that device inputs have gain adjustments is in order to match all source relative volume levels (for those who may not be aware). Some people use the gain control knobs on the rear of some amplifiers. Parasound for example. I do not, and I have these set max. All other control is at the processor.

Acquire and read the manuals, even if it doesn't all make sense right now. It will later.

Gardenstater · July 6

@elmm75 I don't know how old or "vintage" your equipment is but this is pretty interesting regarding glitches that can occur that may or may not trip the protection circuit. If the amp doesn't go into protection mode, something's gonna get fried.

https://www.youtube.com/watch?v=UFH5IP4wl9I

How to remove tweeter from Polk r600

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