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BR-1 Kit Components
I have the BR-1 speaker kit (model BR-1c), and the crossovers run very hot. The resistors actually turn cherry red. Why???
I have a Sherwood 4109 receiver, and if you turn the volume up to loud, the receiver shuts down. Let everything cool down, and then it will work, until they get hot again, Why??? Is the receiver too much for these speakers ??? I have replaced the crossovers twice, and still the same thing. Why??? Thanks
This is simply due to being overpowered. You have plenty of power for the speakers available but they are only rated for 50 watts RMS each. This is just the thermal rating meaning they can reach mechanical limites much faster depending on bass and treble levels etc. You are reaching the thermal rating of the resistors and likely overdriving the speakers themselves at the same time.
Date published: 2013-03-19
On the crossover schematic is there a junction between R1, C2, L2, and the + Speaker terminal? It looks like R1 is the only connection to the driver.
Yes there is a junction between R1, L2, C2, and Positive Terminal. Circuit schematics can be confusing. It helps if you can identify typical networks within the diagram and block them up to see what is going on.R1 and C3 are your Zobel Network, L2 and C2 are your second order LP Filter.I have reconfigured the schematic to one that is more common and highlighted the networks within the schematic (Attached below).Also there is a great video where Mike V from PE puts the crossover together(Attached below).I hope this helps and best of luck.
Date published: 2013-11-25
what is a good speaker kit for a Sherwood rx-4109?
I have the BR-1 speaker kit, and a Sherwood rx-4109 receiver. The receiver is too much for the BR-1 kit. What other speaker kit is availabe that would be compatiable with this reciver? Thanks
100W RMS into 4 Ohms. Try the Dayton Audio RS722.Specifications:Impedance: 4 ohmsFrequency response: 41-20,000 HzSPL: 87.5 dB 2.83V/1mPower handling: 100 watts RMS50W RMS into 8 Ohms. Try the Dayton Audio RS621.Specifications:Impedance: 8 ohmsFrequency response: 60 - 20,000 HzSPL: 88 dB 2.83V/1mPower handling: 65 watts RMSYou can build your own cabinets or buy a kit with a pair of the many cabinets PE sells.NOTE: Be aware that some of the kits are for a single speaker others for a set.
Date published: 2013-03-19
Do you have any plans/designs available to use when constructing the boxes for this kit?
I'd like to build something just like the BR-1 kit that includes the speaker boxes. I noticed it was ported too -- what port should I buy? Thanks.
We do not have plans for this box, unfortunately. However, for the BR-1, the internal dimensions are approximately 7.5" x 13" x 9.75", which calculates to about a 0.55ft³ enclosure. You can adjust the dimensions to suit your needs, so long as the overall volume remains the same (or within about 5% or so). The port in the BR-1 box is a one inch diameter port, approximately 6.5" in length. I've linked a very similar port below for your convenience, you'd simply cut off about 1.25" in length to match the volume of a 1" x 6.5" port.
Date published: 2012-09-29
Are there crossover schematics available for this design?
I am building this speaker set, but I already have the drivers and the tweeters. I would also like to use slightly upgraded crossover components and build it point to point. I am looking for the crossover schematic so I can build it myself. I will be purchasing the BR1-CAB Cabinets as they are very cost effective and look really nice too! Thanks in advance!
Yes, the crossover is explained in great detail in the owner's manual, available here:http://www.parts-express.com/pdf/300-640.pdf
Date published: 2012-09-04
Are the drivers for this speaker ok for outside? I would be building my own cabinet.
As long as they are not in direct rain or sunlight they should be fine, the paper cones are treated and they used rubber surrounds.
Date published: 2013-02-05