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  1. #1

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    Default question about vintage setup, power concerns

    Hey y'all,

    Let me start by describing my current setup.

    Polk SDA 2b's (the signature series, w/ only 2 mid's)
    Marantz 2270 (newly recapped and serviced)
    Pioneer Pl-700 tt
    Generic dvd/cd player

    The system sounds great, and I am very pleased with its performance, EXCEPT at high volumes. I'm a young guy, and occasionally when I'm listening to loud music, it demands to be played louder than normal listening volume. By loud, I mean that I will turn the receiver's volume knob past the half way point, but anything with a beefy base or midrange sound, like rock will seemingly cause a cracking sound. This sound happens on both speakers, but not synchronized. It occurs during "louder" bass passages, and when I increase the bass knob on the receiver it exacerbates the cracking, meaning that it happens with more frequency.

    I am trying to determine if I am experiencing a speaker issue or a power supply issue. Is this due to the fact that the speakers are being pushed to their capacity? Or is this caused by the receiver failing to deliver the necessary power. Or, could my rather old house be failing to deliver enough voltage? Or is there some corrosion, or failure in one of the receiver's components, or are cross overs getting old?

    I was told that the marantz 2270 is a powerful receiver, but these polk sda 2's don't seem too wimpy either. Also, I am using 14 gauge, good quality speaker wire, so I wouldn't think that to be a limiting factor.

    I am too inexperienced to know. I asked my stereo technician, and he said there were too many variables for him to diagnose the problem over the phone. I thought I'd put it you guys on the forum for any suggestions.

  2. #2

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    Welcome NewSDA2. You need a quality high current amp to push the 2B's. I have 2B's and have never heard any crackling or even distortion and elevated levels. You are going to do damage if you are not responsible with the volume knob or get an amp as described above.

    Scott
    I like speakers that are bigger than a small refrigerator but smaller than a big refrigerator:D

  3. #3

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    Quote Originally Posted by MillerLiteScott View Post
    Welcome NewSDA2. You need a quality high current amp to push the 2B's. I have 2B's and have never heard any crackling or even distortion and elevated levels. You are going to do damage if you are not responsible with the volume knob or get an amp as described above.

    Scott
    By quality high current amp he means you'd need a beast of an amp.. at least Adcom GFA-555 or better two...
    Panasonic PT-AE4000U projector for movies
    EluneVision 92" Cinema Gray fixed screen
    Onkyo TX-SR805 Pre/Pro
    Rotel RMB-1075 Amp
    B&W CDM1-SE fronts
    B&W CDM-CNT center
    B&W CDM1 rears
    Samsung DTB-H260F OTA HDTV tuner
    DUAL NHT SubTwo subwoofers
    Velodyne SMS-1
    Oppo BDP-93 Blu-Ray player
    Belkin PF60 Power Center
    Harmony 890 RF remote
    Panasonic TC-P50G20 TV + PS3 in the living room

  4. #4

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    I have a restored Marantz 2270B and while a great sounding vintage receiver it's going to die trying to drive 2B's to the level you are indicating. You're going to need something with a lot more current, and the Adcom brand suggestion would be a good economical yet quality recommendation.
    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

  5. #5

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    +1

    Adcom and 2Bs a budget match made in heaven. You can't get more value than that...for your dollar. I have a GFA-555 and well....it's all been said above!

    cnh

  6. #6
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    Or a Parasound HCA 2200 II should do the job. Its still kind of vintage. Maybe a Pioneer SX-1980?

  7. #7

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    The Pioneer won;t cut it either. Adcom will do a better job than any receiver, vintage or not.
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass

    Pass Aleph 30; Eastern Electric Mini Max; Adcom GDA600; MIT S3/Z Pc; SDA 1C; Squeezebox; Tubes add soul!

  8. #8

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    There are a lot of amps that would make those sing. Anything over 200 wpc should be fine. I really like my Carver TFM 25's. Something like that would work well.
    Sunfire TGP, Sunfire Cinema Grand, Sunfire 300~2 (2), Sunfire True Sub (2),Carver ALS Platinum, Carver AL III, TFM-55, C-19, C-9, TX-8, SDA-490t, SDA-390t

  9. #9

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    Quote Originally Posted by thuffman03 View Post
    There are a lot of amps that would make those sing. Anything over 200 wpc should be fine. I really like my Carver TFM 25's. Something like that would work well.
    (and I just happen to have a TFM-24 for sale - same as 25, but with LEDs instead of meters ;))
    Panasonic PT-AE4000U projector for movies
    EluneVision 92" Cinema Gray fixed screen
    Onkyo TX-SR805 Pre/Pro
    Rotel RMB-1075 Amp
    B&W CDM1-SE fronts
    B&W CDM-CNT center
    B&W CDM1 rears
    Samsung DTB-H260F OTA HDTV tuner
    DUAL NHT SubTwo subwoofers
    Velodyne SMS-1
    Oppo BDP-93 Blu-Ray player
    Belkin PF60 Power Center
    Harmony 890 RF remote
    Panasonic TC-P50G20 TV + PS3 in the living room

  10. #10

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    +1 for the TFM 24. I have had one of those also. I like the LED's bouncing up and down. It's pretty cool to watch.
    Sunfire TGP, Sunfire Cinema Grand, Sunfire 300~2 (2), Sunfire True Sub (2),Carver ALS Platinum, Carver AL III, TFM-55, C-19, C-9, TX-8, SDA-490t, SDA-390t

  11. #11

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    IF you can find a Luxman M-117 amp buy it. You won't be sorry. It has a tube like sound that is sweet. I power my SDA's with it. It is just another option.
    Polk HT system 1: LSIC, LSI25 mains, LSI F/X rears, Lsi F/X rear centers,
    Yamaha RX-V2500 System, Sunfire grand 5 channel, Carver A753 3 channel amp.

    Polk HT system 2: ,Polk CS1000 center, Polk cs400rear center, Polk RT800 mains stacked with RT55's, Polk F/X 1000 rears running on a Yamaha RX-V2200

    Polk Speaker collection: SDA SRS 1.2tl x 2, SRT system, SDA SRS 2 P/B, SDA 2A, SDA 1C Studio, SDA CRS+, Monitor 12 series 2, 7B & 4, SRS 3.1tl, RTA 15tl, LS90

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