Bose Wave Blog

Currently Available on eBay

US Auctions Australian Auctions Austrian Auctions Belgian Auctions Canadian Auctions French Auctions German Auctions Indian Auctions Irish Auctions Italian Auctions Dutch Auctions Polish Auctions Spanish Auctions Swiss Auctions UK Auctions

Best Match Time: ending soonest Time: newly listed Price: lowest first Price: highest first Price + Shipping: lowest first Price + Shipping: highest first

Bose 301 Series II Main / Stereo Speakers    £80.73

Bose 301 series 11 Direct/Reflecting Speakers    £140.00

Bose 301V Bookshelf Speakers Cherry Wood    £82.00

Bose 301 Speakers Series 11 with stands Vintage Retro    £51.00

Bose 301 series IV Main / Stereo Speakers    £49.00

Bose 301 series IV Main / Stereo Speakers    £49.00

Bose 301 series IV Main / Stereo Speakers    £49.00

Bose 301 Series III Reflecting Bookshelf Speaker Set ~ Excellent Condition    £81.98

BEST Speaker Foam Surround Repair Kit-BOSE 301    £9.42

Bose 301 speaker brochure catalogue    £18.06

Bose 301 Series III Main / Stereo Speakers - Direct / Reflecting Speaker System    £39.00

BOSE 301 series 2 TWEETERS (SPEAKER DRIVERS) PAIR    £30.00

BOSE 301 series 2 TWEETERS (SPEAKER DRIVERS) PAIR    £30.00

BOSE 301 series 2 TWEETERS (SPEAKER DRIVERS) PAIR    £30.00

BOSE 301 series 2 TWEETERS (SPEAKER DRIVERS) PAIR    £30.00

BOSE 301 series 1 TWEETERS (SPEAKER DRIVERS) PAIR    £30.00

BOSE 301 series 1 TWEETER (SPEAKER DRIVER)    £15.00

ORIGINAL BOSE 301 SERIES II WOOFER SECTION SPEAKER GRILL COVER (dark brown)    £11.97

Bose 301 Speaker Foam Repair Kit / Woofer Refoam Kit    £11.62

8" SPEAKER FOAM REROLL KIT, SUIT BOSE 301    £9.36

Pair or Bose 301 Series IV Main / Stereo Speakers-Direct Reflecting    £188.46

Speaker Foam Repair Kit Bose 301/305 incl. glue + brush    £16.95

2x Foam Speaker Surrounds - Bose 301, 601, 305    £14.00

2x Bose Connector Terminal Speakers from Vintage 901, 601, 601, 301, 201 models    £12.25

View Page:   1  2

And a selection of products from Amazon

	Bose 301 Series V - Left / right channel speakers - 2-way - light cherry

Speaker impedance questions?

I have an old Realistic STA-84 that I use for parties. The reciever is hitched to a pair of 8-ohm Bose 301 speakers on the A output. I would like to put a set of Pioneer TS-A6905 three way speakers on the B output. However, these are only 4-ohm speakers. The reciever is compatible with 2-16 ohms, but only 8-16 ohms if two sets of speakers are used. The reciever is never usually set above 5 on the volume control unless the song is quiet.
Here are my questions:
-Why does a low impedance speaker cause problems?
-Is it o.k. to use this setup if I keep the volume level below 5 and use a desk fan to ventilate the reciever?
-Can you increase the impedance of a speaker with resistors?

If you're receiver is capable of 2 ohms then you will be ok. Your 8 ohm speakers in parallel with your 4 ohm speakers results in 2.66 ohms.

You can add resistors but it isn't as simple as you think. You will be increasing the DC resistance which will change the damping factor of the speaker. This isn't a good idea as it will change the frequency response. Also the speaker itself includes capacitive and inductive reactance in addition to resistance. There should also be inductors and capacitors in the crossover network. A resistor, inductor, and capacitor in series forms a resonate circuit that can create unexpected changes to the total impedance. The wrong change could create a very low impedance at the resonate frequency which could cause problems for your amplifier. I wouldn't suggest attempting to change the impedance of the speaker by adding a resistor.

mk