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GRS 8PR-8 8" Poly Cone Rubber Surround Woofer
2 way setup
How would this woofer matchup with a Dayton Audio DC28F-8 crossed over at 2khz?
This could depend heavily on how you build your crossover. The woofers will work well at this point and could handle going a little higher with no trouble. The tweeter will need some serious slope if going at 2K though. I would suggest a minimum of 18db at 2k, I would actually suggest going to 3k and using a 12db slope. Very different opinions on crossovers exist. There are a lot of projects with these tweeters you could use as a reference too.The drivers will work well together and I suspect a pretty good sounding system from this configuration. You might want to hit up the forums and see if one of the crossover gurus there could help with a solid design that will make the best use of the drivers.
Date published: 2011-12-13
Will these work well as replacements for dual 8's in a 1.5 cu.ft box?
I have a vintage Jennings Research cabinet that uses 2-8"ers in a sealed box. Crossed over at 2500hz and 500hz respectively.I see from the specs that PE recommends smaller box and since there's 2 drivers can essentially double the box size? Which would be about 1.6 cuft. But, Qts looks like they should want bigger box?
These will work fine for that application. The box size we have listed is a high Q alignment because the optimally flat volume is quite large.
Date published: 2013-06-27
would this be a good speaker when paired with Dayton Audio DC28F-8 1-1/8" Silk Dome and crosed at 2k for mtm also want to run 4 drivers in mains
mis match this tweeter will outrun this type of woofer in 8 in the 6.5 or 7 might talk into the mid-range . spend the extra few $ on a slightly better woofers and check the discount on quantity /clearance like the auri 6 or 8 then you gotta matched ,bang for buck combo, don't let the small neo magnet scare you LOOK AT THE SPECS
Date published: 2011-12-13
I was going to pull the trigger on 4 of these 2day for a rebuild project, a pair of advent heritage towers. Another user has done the same but I notice that the towers are 6ohm not 8. is this going to cause any issues? is it the crossover that is 6ohms or is it the speakers? I can switch the ohms on my receiver so I'm good there.I have included a pic of the crossover if that helps out the folks that are smarter than I.
Yes, the speaker's impedance will have s slight effect on your Advent crossover. All passive crossovers are designed for many desired factors. It is much too complicated to fully discuss in this forum.Understanding that speaker imp values change slightly with frequency. Your Advents have a 12db slope, because of thisThe effect will be minimal to most listeners. A speaker test will show the difference clearly if you have a test of an origial "good" speaker for comparison.You can design a Zobel Network to compensate for the 2 ohm difference but you will need you crossover data to do this. Google Zobel Network and review what is needed.Every speaker system has frequencies where they operate more efficiently so at certain frequencies the speaker will play at a slightly different volume. Using this replacement speaker will likely change that resonant point thus changing the original sound characteristic. My oppinion is that the room acoustic properties can make more difference than this, so why worry. The Advents will still sound good but if you get an odd peak then add an equalizer and tame it down.Good luck.
Date published: 2014-03-11
Can I use this 2 woofer in ported box With a plate amplifier ? What box spec?
Planning to use these 2 woofers with 70 sa dayton amp in 4 ohm load parallel wiring pushing with the low level input. There also 4 2 ohm 5 inch bazooka mid bass speaker wired in series to get 8 ohms and 2 2inch 4 ohm tweeters wired in series to get 8 ohms running off the high level input of the plate amplifier that receiving power from my Yamaha htr 3063 at 8 ohm load at 100 watt. . What be the best box recommended and size cu ft of each speaker. Planning to put these into one tower? Any suggestions?
I would not suggest putting these in a ported enclosure. They do not model very well in most airspace settings or with various tuning frequencies. They are fairly flexible in a sealed box. My suggestion is 1.4 cu ft sealed for both or .72 for each one.
Date published: 2012-07-09
Would these GRS 8PR-8 speakers be a good replacement for Bose 301 Series II cabinets?
The 8" woofers in my Bose 301 Series II cabinets are shot. Would these GRS 8PR-8 speakers be a good replacement? They are ported & previous answers state that these need to be used in a sealed enclosure. If they shouldn't be used, could someone recommend one that would be better suited? Thanks! Tom
This can be used in that cabinet with no real problems. The high Qts makes for a typical sealed alignment but running the numbers for a vented alignments around the size of a 301, it doesnt look too bad. The group delay gets a bit high in the low bass, but in reality the tuning of the cabinet prevents this range from even being used.
Date published: 2012-11-27