Receiver for LSI25

pitlwong
pitlwong Posts: 6
edited December 2007 in Electronics
I just get a pair of LSI25. Can anyone recommend receivers that match them?
Thanks,
Post edited by pitlwong on
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  • BaggedLancer
    BaggedLancer Posts: 6,371
    edited December 2007
    Separate amplification is highly recommend(almost a must) to make those sing.

    Grats on the purchase.
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  • dkg999
    dkg999 Posts: 5,647
    edited December 2007
    The only one I could recommend would be B&K. Mine runs an LSi HT system just fine. You really should consider separate amps.
    DKG999
    HT System: LSi9, LSiCx2, LSiFX, LSi7, SVS 20-39 PC+, B&K 507.s2 AVR, B&K Ref 125.2, Tripplite LCR-2400, Cambridge 650BD, Signal Cable PC/SC, BJC IC, Samsung 55" LED

    Music System: Magnepan 1.6QR, SVS SB12+, ARC pre, Parasound HCA1500 vertically bi-amped, Jolida CDP, Pro-Ject RM5.1SE TT, Pro-Ject TubeBox SE phono pre, SBT, PS Audio DLIII DAC
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  • pitlwong
    pitlwong Posts: 6
    edited December 2007
    I am new in this area. What is separate amplifier? Does it mean I need to have an amplifier between the receiver and the speaker?
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  • dkg999
    dkg999 Posts: 5,647
    edited December 2007
    Yes. You would use the pre-outs on your receiver to drive a separate amplifier that powers your speakers. You must have a receiver with pre-outs for all channels. You can use a separate amplifier for your front/center, and use the receivers internal amps for the surround channels if you want.
    DKG999
    HT System: LSi9, LSiCx2, LSiFX, LSi7, SVS 20-39 PC+, B&K 507.s2 AVR, B&K Ref 125.2, Tripplite LCR-2400, Cambridge 650BD, Signal Cable PC/SC, BJC IC, Samsung 55" LED

    Music System: Magnepan 1.6QR, SVS SB12+, ARC pre, Parasound HCA1500 vertically bi-amped, Jolida CDP, Pro-Ject RM5.1SE TT, Pro-Ject TubeBox SE phono pre, SBT, PS Audio DLIII DAC
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  • hockeyboy
    hockeyboy Posts: 1,428
    edited December 2007
    Just make sure the amp is rated to 4 ohms and you ideally get 200 watts per channel (WPC). I love my Sunfire but it's a bit of coin.
    My Main Gear
    Mitsu HC5000 (Proj.)
    Marantz SR8001 (AVR)
    Sunfire TGA7200 (AMP)
    Marantz DV7001 (SACD)
    Samsung BD-P1500 Blu-Ray
    LSi 15's (Front)
    LSiC (Center)
    LSiFx (Surrounds)
    DUAL SVS 20-39 CS Plus     (Passive Subs)
    Marantz IS201 I-Pod Dock[/SIZE]
    Panamax M5300EX
    Carada Criterion 106" Brightwhite Screen
    Sunfire TGA 5200 & (4) B&W 605's in the party room
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  • pitlwong
    pitlwong Posts: 6
    edited December 2007
    What Watts do I need for the amplifier? Do I need amplifier only for the front speakers?
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  • cfrizz
    cfrizz Posts: 13,415
    edited December 2007
    It is best to get a minimum of 200 watts per channel with the LSI's. What does the rest of your speakers & system consist of? If you have other LSI's then all should be amped since all are 4ohm speakers.
    Marantz AV-7705 PrePro, Classé 5 channel 200wpc Amp, Oppo 103 BluRay, Rotel RCD-1072 CDP, Sony XBR-49X800E TV, Polk S60 Main Speakers, Polk ES30 Center Channel, Polk S15 Surround Speakers SVS SB12-NSD x2
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  • pitlwong
    pitlwong Posts: 6
    edited December 2007
    Maybe it is stupid to ask the question. But, Can an Onkyo TX-SR805 do the job? It says "Certified 4ohms performance" ....
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  • cfrizz
    cfrizz Posts: 13,415
    edited December 2007
    All that means is that it limits the power to the speakers so that the receiver doesn't burn itself out.

    It does have preouts so get separate amplification.
    Marantz AV-7705 PrePro, Classé 5 channel 200wpc Amp, Oppo 103 BluRay, Rotel RCD-1072 CDP, Sony XBR-49X800E TV, Polk S60 Main Speakers, Polk ES30 Center Channel, Polk S15 Surround Speakers SVS SB12-NSD x2
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  • pitlwong
    pitlwong Posts: 6
    edited December 2007
    It seems local stores like circuitcity, bestbuy do not provide too much choices of amplifiers. Where can I buy separate amplifiers? The local stores have lots of car audio amplifiers. What is the difference between the car audio amplifier and the amplifier we are talking about here. Are the car amplifiers just low performance ones?

    Are power and THD the two major parameters I should care when I choose an amplifier? I checked Sunfire website. Their amplifiers (TGA5200, TGA7200) only specify THD for 8 ohm at 1KHz (0.5%). No spec. for 4 ohm. I remember I read somewhere on polk web that THD should not be larger than 0.5%. Are these amplifier good enough?
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  • pitlwong
    pitlwong Posts: 6
    edited December 2007
    The outlaw website specifies their amplifiers (2200 M-block, 7200) THD for 4 ohm, 20 Hz - 20 kHz, <0.05%. Are they better on paper?

    Could you recommend any other brand of amplifiers? Thanks,
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  • cfrizz
    cfrizz Posts: 13,415
    edited December 2007
    Outlaw, Rotel, Parasound, Sunfire, B & K, Adcom...the list is endless. You can get more bang for your buck getting a used one from Audiogon.

    All of these companies make terrific products, you can't go wrong with any of them.
    Marantz AV-7705 PrePro, Classé 5 channel 200wpc Amp, Oppo 103 BluRay, Rotel RCD-1072 CDP, Sony XBR-49X800E TV, Polk S60 Main Speakers, Polk ES30 Center Channel, Polk S15 Surround Speakers SVS SB12-NSD x2
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