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Monoprice SWA-400 Subwoofer price history, checked Nov 15, 2026: Great price. $339.99 is 43% below the $601.99 it normally sells for.

Monoprice SWA-400 Subwoofer Amplifier - Black - 400 watt with DSP, Presets, Cool Class D Amps

Rated2.0(4 ratings)In stock

Great price

$339.99 is 43% below the $601.99 it normally sells for.

Now
$339.99
Normally
$601.99
Lowest in 145 days
$319.99(Jul 29)
Highest
$601.99
Evidence: Strong145 days tracked2 price changes

Where today's price sits

View on amazon.com (opens in a new tab)

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Get an email when the price drops

Good: 5%+ below normal. Great: 20%+ below. One email when it happens, at a price below today's $339.99. No account, no newsletter.

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Price history

Tracked since Jun 22 · 145 days · 2 price changes

Ahead of Black Friday 2026 (Nov 27), it is already 43% below its normal price of $601.99. Monoprice SWA-400 Subwoofer Amplifier price history, checked Nov 15, 2026: current price $339.99, normal (typical) price $601.99, average $510.97 over 145 days, lowest $319.99 (Jul 29, 2026), highest $601.99 (Sep 12, 2026).

Loading the price chart.

  • Price
  • Not checked for 3+ days
  • Normal $601.99
  • 5% or more below normal

How often does it drop below normal?

In the 145 days we've tracked it, it stayed 5% or more below today's normal price for an hour or more twice, typically lasting about 14 days. It's below normal right now.

A count of what happened, not a prediction.

Other ways to buy

  • New from

    $339.99

    Amazon.comFulfilled by Amazon · Seller rating 100%

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Get this as JSONThe same verdict and prices, from the TrackPin API.
GET/api/v1/product/B07KFQ997D
Request
curl https://trackpin.co/api/v1/product/B07KFQ997D \
  -H "x-api-key: $TRACKPIN_API_KEY"

This is exactly what the API returns for this product. Free keys include 100 requests a day.

Request a key
Live response, As of 03:45 UTC
{
  "asin": "B07KFQ997D",
  "title": "Monoprice SWA-400 Subwoofer Amplifier - Black - 400 watt with DSP, Presets, Cool Class D Amps",
  "image": "https://m.media-amazon.com/images/I/51hT0Yp3iiL._AC_SL500_.jpg",
  "currency": "USD",
  "category": "CE",
  "category_label": "Electronics",
  "in_stock": true,
  "price": {
    "current_cents": 33999,
    "reference_cents": 60199,
    "discount_pct": 43.52,
    "is_deal": true,
    "observed_at": 1794707426286,
    "changed_at": 1794626081262,
    "checked_at": 1794707426286,
    "source": "stored"
  },
  "verdict": {
    "label": "great",
    "text": "Great price",
    "pct_vs_normal": 43.52,
    "evidence": "strong",
    "stale": false,
    "suspect": false,
    "steady_since": null,
    "sentence": "Great price. $339.99 is 43% below the $601.99 it normally sells for."
  },
  "listing_claim": null,
  "stats": {
    "min_cents": 31999,
    "max_cents": 60199,
    "avg_cents": 51097,
    "history_days": 145,
    "price_levels": 199,
    "price_changes": 2,
    "distinct_prices": 3,
    "lowest_at": 1785326952725
  },
  "history": [
    {
      "price_cents": 31999,
      "from": 1785292371856,
      "to": 1785292371856
    },
    {
      "price_cents": 31999,
      "from": 1785293993770,
      "to": 1785306716376
    },
    {
      "price_cents": 31999,
      "from": 1785326952725,
      "to": 1785326952725
    },
    {
      "price_cents": 60199,
      "from": 1789189702159,
      "to": 1794614133278
    },
    {
      "price_cents": 33999,
      "from": 1794626081262,
      "to": 1794707426286
    }
  ],
  "last_seen": 1794707426286
}
// … 194 more steps in the full response

Normal price: the lowest price level the product held for at least 15% of the last 45 days (about a week). Prices within 3% of each other count as one level, and we use the lowest price in that level. How we calculate it → Prices are observations of amazon.com and may be incomplete or delayed. TrackPin is not affiliated with Amazon.